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Finding the Fourth Proportional to 156,371.11, 215,792.47 and 84,751.11

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Solution

The fourth proportional to 156,371.11, 215,792.47 and 84,751.11 is: 116,956.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,371.11 : 215,792.47 = 84,751.11 : x
  2. Step 2: Convert to fraction form
    156,371.11/215,792.47 = 84,751.11/x
  3. Step 3: Cross multiply
    156,371.11x = 215,792.47 × 84,751.11
  4. Step 4: Simplify right side
    156,371.11x = 18,288,651,468.08
  5. Step 5: Solve for x
    x = 18,288,651,468.08/156,371.11
  6. Step 6: Final answer
    x = 116,956.72

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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.