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Finding the Fourth Proportional to 156,687.60, 235,132.20 and 86,617.20

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Solution

The fourth proportional to 156,687.60, 235,132.20 and 86,617.20 is: 129,981.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,687.60 : 235,132.20 = 86,617.20 : x
  2. Step 2: Convert to fraction form
    156,687.60/235,132.20 = 86,617.20/x
  3. Step 3: Cross multiply
    156,687.60x = 235,132.20 × 86,617.20
  4. Step 4: Simplify right side
    156,687.60x = 20,366,492,793.84
  5. Step 5: Solve for x
    x = 20,366,492,793.84/156,687.60
  6. Step 6: Final answer
    x = 129,981.52

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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.