Home / 80,930,220.80-121,395,331.20-72,427,164.80

Finding the Fourth Proportional to 80,930,220.80, 121,395,331.20 and 72,427,164.80

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Solution

The fourth proportional to 80,930,220.80, 121,395,331.20 and 72,427,164.80 is: 108,640,747.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,930,220.80 : 121,395,331.20 = 72,427,164.80 : x
  2. Step 2: Convert to fraction form
    80,930,220.80/121,395,331.20 = 72,427,164.80/x
  3. Step 3: Cross multiply
    80,930,220.80x = 121,395,331.20 × 72,427,164.80
  4. Step 4: Simplify right side
    80,930,220.80x = 8,792,319,658,772,982
  5. Step 5: Solve for x
    x = 8,792,319,658,772,982/80,930,220.80
  6. Step 6: Final answer
    x = 108,640,747.20

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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.