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Finding the Fourth Proportional to 81,665.76, 112,695.12 and 45,855.12

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Solution

The fourth proportional to 81,665.76, 112,695.12 and 45,855.12 is: 63,278.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,665.76 : 112,695.12 = 45,855.12 : x
  2. Step 2: Convert to fraction form
    81,665.76/112,695.12 = 45,855.12/x
  3. Step 3: Cross multiply
    81,665.76x = 112,695.12 × 45,855.12
  4. Step 4: Simplify right side
    81,665.76x = 5,167,648,251.01
  5. Step 5: Solve for x
    x = 5,167,648,251.01/81,665.76
  6. Step 6: Final answer
    x = 63,278.03

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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.