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Finding the Fourth Proportional to 156,753.48, 216,321.39 and 85,134.90

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Solution

The fourth proportional to 156,753.48, 216,321.39 and 85,134.90 is: 117,487.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,753.48 : 216,321.39 = 85,134.90 : x
  2. Step 2: Convert to fraction form
    156,753.48/216,321.39 = 85,134.90/x
  3. Step 3: Cross multiply
    156,753.48x = 216,321.39 × 85,134.90
  4. Step 4: Simplify right side
    156,753.48x = 18,416,499,905.51
  5. Step 5: Solve for x
    x = 18,416,499,905.51/156,753.48
  6. Step 6: Final answer
    x = 117,487.02

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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.