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Finding the Fourth Proportional to 72,581,609.80, 108,872,414.70 and 48,395,139.40

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Solution

The fourth proportional to 72,581,609.80, 108,872,414.70 and 48,395,139.40 is: 72,592,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,581,609.80 : 108,872,414.70 = 48,395,139.40 : x
  2. Step 2: Convert to fraction form
    72,581,609.80/108,872,414.70 = 48,395,139.40/x
  3. Step 3: Cross multiply
    72,581,609.80x = 108,872,414.70 × 48,395,139.40
  4. Step 4: Simplify right side
    72,581,609.80x = 5,268,895,686,221,109
  5. Step 5: Solve for x
    x = 5,268,895,686,221,109/72,581,609.80
  6. Step 6: Final answer
    x = 72,592,709.10

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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.