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Finding the Fourth Proportional to 72,472.97, 99,978.25 and 48,285.16

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Solution

The fourth proportional to 72,472.97, 99,978.25 and 48,285.16 is: 66,610.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,472.97 : 99,978.25 = 48,285.16 : x
  2. Step 2: Convert to fraction form
    72,472.97/99,978.25 = 48,285.16/x
  3. Step 3: Cross multiply
    72,472.97x = 99,978.25 × 48,285.16
  4. Step 4: Simplify right side
    72,472.97x = 4,827,466,080.02
  5. Step 5: Solve for x
    x = 4,827,466,080.02/72,472.97
  6. Step 6: Final answer
    x = 66,610.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.