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Finding the Fourth Proportional to 82,720,981.80, 124,081,472.70 and 55,511,202.60

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Solution

The fourth proportional to 82,720,981.80, 124,081,472.70 and 55,511,202.60 is: 83,266,803.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,720,981.80 : 124,081,472.70 = 55,511,202.60 : x
  2. Step 2: Convert to fraction form
    82,720,981.80/124,081,472.70 = 55,511,202.60/x
  3. Step 3: Cross multiply
    82,720,981.80x = 124,081,472.70 × 55,511,202.60
  4. Step 4: Simplify right side
    82,720,981.80x = 6,887,911,769,956,069
  5. Step 5: Solve for x
    x = 6,887,911,769,956,069/82,720,981.80
  6. Step 6: Final answer
    x = 83,266,803.90

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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.