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Finding the Fourth Proportional to 81,626.40, 112,655.80 and 45,336

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Solution

The fourth proportional to 81,626.40, 112,655.80 and 45,336 is: 62,569.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,626.40 : 112,655.80 = 45,336 : x
  2. Step 2: Convert to fraction form
    81,626.40/112,655.80 = 45,336/x
  3. Step 3: Cross multiply
    81,626.40x = 112,655.80 × 45,336
  4. Step 4: Simplify right side
    81,626.40x = 5,107,363,348.80
  5. Step 5: Solve for x
    x = 5,107,363,348.80/81,626.40
  6. Step 6: Final answer
    x = 62,569.99

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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.