Home / 78,343,669.80-117,515,504.70-70,407,484.20

Finding the Fourth Proportional to 78,343,669.80, 117,515,504.70 and 70,407,484.20

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Solution

The fourth proportional to 78,343,669.80, 117,515,504.70 and 70,407,484.20 is: 105,611,226.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,343,669.80 : 117,515,504.70 = 70,407,484.20 : x
  2. Step 2: Convert to fraction form
    78,343,669.80/117,515,504.70 = 70,407,484.20/x
  3. Step 3: Cross multiply
    78,343,669.80x = 117,515,504.70 × 70,407,484.20
  4. Step 4: Simplify right side
    78,343,669.80x = 8,273,971,040,420,276
  5. Step 5: Solve for x
    x = 8,273,971,040,420,276/78,343,669.80
  6. Step 6: Final answer
    x = 105,611,226.30

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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.