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Finding the Fourth Proportional to 72,581,490.90, 108,872,238.15 and 72,581,490.90

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Solution

The fourth proportional to 72,581,490.90, 108,872,238.15 and 72,581,490.90 is: 108,872,238.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,581,490.90 : 108,872,238.15 = 72,581,490.90 : x
  2. Step 2: Convert to fraction form
    72,581,490.90/108,872,238.15 = 72,581,490.90/x
  3. Step 3: Cross multiply
    72,581,490.90x = 108,872,238.15 × 72,581,490.90
  4. Step 4: Simplify right side
    72,581,490.90x = 7,902,109,362,546,859
  5. Step 5: Solve for x
    x = 7,902,109,362,546,859/72,581,490.90
  6. Step 6: Final answer
    x = 108,872,238.15

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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.