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Finding the Fourth Proportional to 77,327,446.80, 115,988,545.80 and 19,820,281.80

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Solution

The fourth proportional to 77,327,446.80, 115,988,545.80 and 19,820,281.80 is: 29,729,750.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,327,446.80 : 115,988,545.80 = 19,820,281.80 : x
  2. Step 2: Convert to fraction form
    77,327,446.80/115,988,545.80 = 19,820,281.80/x
  3. Step 3: Cross multiply
    77,327,446.80x = 115,988,545.80 × 19,820,281.80
  4. Step 4: Simplify right side
    77,327,446.80x = 2,298,925,663,328,206.50
  5. Step 5: Solve for x
    x = 2,298,925,663,328,206.50/77,327,446.80
  6. Step 6: Final answer
    x = 29,729,750.02

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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.