Home / 120,545.04-180,855.10-72,565.78

Finding the Fourth Proportional to 120,545.04, 180,855.10 and 72,565.78

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Solution

The fourth proportional to 120,545.04, 180,855.10 and 72,565.78 is: 108,871.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,545.04 : 180,855.10 = 72,565.78 : x
  2. Step 2: Convert to fraction form
    120,545.04/180,855.10 = 72,565.78/x
  3. Step 3: Cross multiply
    120,545.04x = 180,855.10 × 72,565.78
  4. Step 4: Simplify right side
    120,545.04x = 13,123,891,398.48
  5. Step 5: Solve for x
    x = 13,123,891,398.48/120,545.04
  6. Step 6: Final answer
    x = 108,871.27

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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.