Home / 80,708,629.80-121,381,809.30-72,418,150.20

Finding the Fourth Proportional to 80,708,629.80, 121,381,809.30 and 72,418,150.20

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Solution

The fourth proportional to 80,708,629.80, 121,381,809.30 and 72,418,150.20 is: 108,913,335.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,708,629.80 : 121,381,809.30 = 72,418,150.20 : x
  2. Step 2: Convert to fraction form
    80,708,629.80/121,381,809.30 = 72,418,150.20/x
  3. Step 3: Cross multiply
    80,708,629.80x = 121,381,809.30 × 72,418,150.20
  4. Step 4: Simplify right side
    80,708,629.80x = 8,790,246,097,435,157
  5. Step 5: Solve for x
    x = 8,790,246,097,435,157/80,708,629.80
  6. Step 6: Final answer
    x = 108,913,335.78

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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.