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Finding the Fourth Proportional to 81,726.62, 112,785.62 and 45,915.91

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Solution

The fourth proportional to 81,726.62, 112,785.62 and 45,915.91 is: 63,365.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,726.62 : 112,785.62 = 45,915.91 : x
  2. Step 2: Convert to fraction form
    81,726.62/112,785.62 = 45,915.91/x
  3. Step 3: Cross multiply
    81,726.62x = 112,785.62 × 45,915.91
  4. Step 4: Simplify right side
    81,726.62x = 5,178,653,865.67
  5. Step 5: Solve for x
    x = 5,178,653,865.67/81,726.62
  6. Step 6: Final answer
    x = 63,365.57

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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.