Home / 78,003,516.30-117,005,274.45-39,739,764.30

Finding the Fourth Proportional to 78,003,516.30, 117,005,274.45 and 39,739,764.30

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Solution

The fourth proportional to 78,003,516.30, 117,005,274.45 and 39,739,764.30 is: 59,609,646.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003,516.30 : 117,005,274.45 = 39,739,764.30 : x
  2. Step 2: Convert to fraction form
    78,003,516.30/117,005,274.45 = 39,739,764.30/x
  3. Step 3: Cross multiply
    78,003,516.30x = 117,005,274.45 × 39,739,764.30
  4. Step 4: Simplify right side
    78,003,516.30x = 4,649,762,028,499,812
  5. Step 5: Solve for x
    x = 4,649,762,028,499,812/78,003,516.30
  6. Step 6: Final answer
    x = 59,609,646.45

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.