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Finding the Fourth Proportional to 81,715.96, 112,770.96 and 45,905.20

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Solution

The fourth proportional to 81,715.96, 112,770.96 and 45,905.20 is: 63,350.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,715.96 : 112,770.96 = 45,905.20 : x
  2. Step 2: Convert to fraction form
    81,715.96/112,770.96 = 45,905.20/x
  3. Step 3: Cross multiply
    81,715.96x = 112,770.96 × 45,905.20
  4. Step 4: Simplify right side
    81,715.96x = 5,176,773,472.99
  5. Step 5: Solve for x
    x = 5,176,773,472.99/81,715.96
  6. Step 6: Final answer
    x = 63,350.82

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1.5x scale

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.