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Finding the Fourth Proportional to 72,581,617.80, 108,872,426.70 and 48,395,147.40

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Solution

The fourth proportional to 72,581,617.80, 108,872,426.70 and 48,395,147.40 is: 72,592,721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,581,617.80 : 108,872,426.70 = 48,395,147.40 : x
  2. Step 2: Convert to fraction form
    72,581,617.80/108,872,426.70 = 48,395,147.40/x
  3. Step 3: Cross multiply
    72,581,617.80x = 108,872,426.70 × 48,395,147.40
  4. Step 4: Simplify right side
    72,581,617.80x = 5,268,897,137,942,196
  5. Step 5: Solve for x
    x = 5,268,897,137,942,196/72,581,617.80
  6. Step 6: Final answer
    x = 72,592,721.10

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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.