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Finding the Fourth Proportional to 137,896,221.60, 206,844,332.40 and 80,453,354.40

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Solution

The fourth proportional to 137,896,221.60, 206,844,332.40 and 80,453,354.40 is: 120,680,031.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,896,221.60 : 206,844,332.40 = 80,453,354.40 : x
  2. Step 2: Convert to fraction form
    137,896,221.60/206,844,332.40 = 80,453,354.40/x
  3. Step 3: Cross multiply
    137,896,221.60x = 206,844,332.40 × 80,453,354.40
  4. Step 4: Simplify right side
    137,896,221.60x = 16,641,320,380,208,604
  5. Step 5: Solve for x
    x = 16,641,320,380,208,604/137,896,221.60
  6. Step 6: Final answer
    x = 120,680,031.60

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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.