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Finding the Fourth Proportional to 81,064.62, 111,864.52 and 45,256.90

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Solution

The fourth proportional to 81,064.62, 111,864.52 and 45,256.90 is: 62,451.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,064.62 : 111,864.52 = 45,256.90 : x
  2. Step 2: Convert to fraction form
    81,064.62/111,864.52 = 45,256.90/x
  3. Step 3: Cross multiply
    81,064.62x = 111,864.52 × 45,256.90
  4. Step 4: Simplify right side
    81,064.62x = 5,062,641,395.19
  5. Step 5: Solve for x
    x = 5,062,641,395.19/81,064.62
  6. Step 6: Final answer
    x = 62,451.92

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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.