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Finding the Fourth Proportional to 81,773.72, 112,528.88 and 72,364.76

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Solution

The fourth proportional to 81,773.72, 112,528.88 and 72,364.76 is: 99,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,773.72 : 112,528.88 = 72,364.76 : x
  2. Step 2: Convert to fraction form
    81,773.72/112,528.88 = 72,364.76/x
  3. Step 3: Cross multiply
    81,773.72x = 112,528.88 × 72,364.76
  4. Step 4: Simplify right side
    81,773.72x = 8,143,125,394.27
  5. Step 5: Solve for x
    x = 8,143,125,394.27/81,773.72
  6. Step 6: Final answer
    x = 99,581.20

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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.