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Finding the Fourth Proportional to 72,693.10, 109,046.85 and 25,300.90

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Solution

The fourth proportional to 72,693.10, 109,046.85 and 25,300.90 is: 37,953.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,693.10 : 109,046.85 = 25,300.90 : x
  2. Step 2: Convert to fraction form
    72,693.10/109,046.85 = 25,300.90/x
  3. Step 3: Cross multiply
    72,693.10x = 109,046.85 × 25,300.90
  4. Step 4: Simplify right side
    72,693.10x = 2,758,983,447.17
  5. Step 5: Solve for x
    x = 2,758,983,447.17/72,693.10
  6. Step 6: Final answer
    x = 37,953.86

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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.