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Finding the Fourth Proportional to 81,705.68, 112,753.90 and 45,895.72

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Solution

The fourth proportional to 81,705.68, 112,753.90 and 45,895.72 is: 63,336.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,705.68 : 112,753.90 = 45,895.72 : x
  2. Step 2: Convert to fraction form
    81,705.68/112,753.90 = 45,895.72/x
  3. Step 3: Cross multiply
    81,705.68x = 112,753.90 × 45,895.72
  4. Step 4: Simplify right side
    81,705.68x = 5,174,921,423.31
  5. Step 5: Solve for x
    x = 5,174,921,423.31/81,705.68
  6. Step 6: Final answer
    x = 63,336.13

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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.