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Finding the Fourth Proportional to 156,729.70, 235,224.15 and 72,619.30

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Solution

The fourth proportional to 156,729.70, 235,224.15 and 72,619.30 is: 108,989.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,729.70 : 235,224.15 = 72,619.30 : x
  2. Step 2: Convert to fraction form
    156,729.70/235,224.15 = 72,619.30/x
  3. Step 3: Cross multiply
    156,729.70x = 235,224.15 × 72,619.30
  4. Step 4: Simplify right side
    156,729.70x = 17,081,813,116.10
  5. Step 5: Solve for x
    x = 17,081,813,116.10/156,729.70
  6. Step 6: Final answer
    x = 108,989.00

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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.