Home / 72,695,437.20-109,102,642.20-72,128,566.80

Finding the Fourth Proportional to 72,695,437.20, 109,102,642.20 and 72,128,566.80

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Solution

The fourth proportional to 72,695,437.20, 109,102,642.20 and 72,128,566.80 is: 108,251,872.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,695,437.20 : 109,102,642.20 = 72,128,566.80 : x
  2. Step 2: Convert to fraction form
    72,695,437.20/109,102,642.20 = 72,128,566.80/x
  3. Step 3: Cross multiply
    72,695,437.20x = 109,102,642.20 × 72,128,566.80
  4. Step 4: Simplify right side
    72,695,437.20x = 7,869,417,215,979,199
  5. Step 5: Solve for x
    x = 7,869,417,215,979,199/72,695,437.20
  6. Step 6: Final answer
    x = 108,251,872.73

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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.