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Finding the Fourth Proportional to 89,812.80, 134,719.20 and 81,502.20

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Solution

The fourth proportional to 89,812.80, 134,719.20 and 81,502.20 is: 122,253.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,812.80 : 134,719.20 = 81,502.20 : x
  2. Step 2: Convert to fraction form
    89,812.80/134,719.20 = 81,502.20/x
  3. Step 3: Cross multiply
    89,812.80x = 134,719.20 × 81,502.20
  4. Step 4: Simplify right side
    89,812.80x = 10,979,911,182.24
  5. Step 5: Solve for x
    x = 10,979,911,182.24/89,812.80
  6. Step 6: Final answer
    x = 122,253.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.