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Finding the Fourth Proportional to 156,980.56, 235,471.08 and 72,694.80

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Solution

The fourth proportional to 156,980.56, 235,471.08 and 72,694.80 is: 109,042.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,980.56 : 235,471.08 = 72,694.80 : x
  2. Step 2: Convert to fraction form
    156,980.56/235,471.08 = 72,694.80/x
  3. Step 3: Cross multiply
    156,980.56x = 235,471.08 × 72,694.80
  4. Step 4: Simplify right side
    156,980.56x = 17,117,523,066.38
  5. Step 5: Solve for x
    x = 17,117,523,066.38/156,980.56
  6. Step 6: Final answer
    x = 109,042.31

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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.