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Finding the Fourth Proportional to 135,444.92, 186,964.14 and 81,732.20

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Solution

The fourth proportional to 135,444.92, 186,964.14 and 81,732.20 is: 112,820.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,444.92 : 186,964.14 = 81,732.20 : x
  2. Step 2: Convert to fraction form
    135,444.92/186,964.14 = 81,732.20/x
  3. Step 3: Cross multiply
    135,444.92x = 186,964.14 × 81,732.20
  4. Step 4: Simplify right side
    135,444.92x = 15,280,990,483.31
  5. Step 5: Solve for x
    x = 15,280,990,483.31/135,444.92
  6. Step 6: Final answer
    x = 112,820.70

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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.