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Finding the Fourth Proportional to 156,710.96, 216,207.72 and 100,154.96

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Solution

The fourth proportional to 156,710.96, 216,207.72 and 100,154.96 is: 138,179.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,710.96 : 216,207.72 = 100,154.96 : x
  2. Step 2: Convert to fraction form
    156,710.96/216,207.72 = 100,154.96/x
  3. Step 3: Cross multiply
    156,710.96x = 216,207.72 × 100,154.96
  4. Step 4: Simplify right side
    156,710.96x = 21,654,275,548.29
  5. Step 5: Solve for x
    x = 21,654,275,548.29/156,710.96
  6. Step 6: Final answer
    x = 138,179.71

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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.