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Finding the Fourth Proportional to 206,981.28, 310,212.18 and 88,513.32

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Solution

The fourth proportional to 206,981.28, 310,212.18 and 88,513.32 is: 132,658.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,981.28 : 310,212.18 = 88,513.32 : x
  2. Step 2: Convert to fraction form
    206,981.28/310,212.18 = 88,513.32/x
  3. Step 3: Cross multiply
    206,981.28x = 310,212.18 × 88,513.32
  4. Step 4: Simplify right side
    206,981.28x = 27,457,909,956.24
  5. Step 5: Solve for x
    x = 27,457,909,956.24/206,981.28
  6. Step 6: Final answer
    x = 132,658.90

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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.