Home / 78,003,208.80-117,004,813.20-39,739,456.80

Finding the Fourth Proportional to 78,003,208.80, 117,004,813.20 and 39,739,456.80

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Solution

The fourth proportional to 78,003,208.80, 117,004,813.20 and 39,739,456.80 is: 59,609,185.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003,208.80 : 117,004,813.20 = 39,739,456.80 : x
  2. Step 2: Convert to fraction form
    78,003,208.80/117,004,813.20 = 39,739,456.80/x
  3. Step 3: Cross multiply
    78,003,208.80x = 117,004,813.20 × 39,739,456.80
  4. Step 4: Simplify right side
    78,003,208.80x = 4,649,707,719,553,470
  5. Step 5: Solve for x
    x = 4,649,707,719,553,470/78,003,208.80
  6. Step 6: Final answer
    x = 59,609,185.20

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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.