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Finding the Fourth Proportional to 156,861.70, 235,422.15 and 72,751.30

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Solution

The fourth proportional to 156,861.70, 235,422.15 and 72,751.30 is: 109,187.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,861.70 : 235,422.15 = 72,751.30 : x
  2. Step 2: Convert to fraction form
    156,861.70/235,422.15 = 72,751.30/x
  3. Step 3: Cross multiply
    156,861.70x = 235,422.15 × 72,751.30
  4. Step 4: Simplify right side
    156,861.70x = 17,127,267,461.30
  5. Step 5: Solve for x
    x = 17,127,267,461.30/156,861.70
  6. Step 6: Final answer
    x = 109,187.06

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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.