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Finding the Fourth Proportional to 156,221.70, 215,585.52 and 84,601.70

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Solution

The fourth proportional to 156,221.70, 215,585.52 and 84,601.70 is: 116,750.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,221.70 : 215,585.52 = 84,601.70 : x
  2. Step 2: Convert to fraction form
    156,221.70/215,585.52 = 84,601.70/x
  3. Step 3: Cross multiply
    156,221.70x = 215,585.52 × 84,601.70
  4. Step 4: Simplify right side
    156,221.70x = 18,238,901,487.38
  5. Step 5: Solve for x
    x = 18,238,901,487.38/156,221.70
  6. Step 6: Final answer
    x = 116,750.12

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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.