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Finding the Fourth Proportional to 113,840.30, 170,760.45 and 72,470.70

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Solution

The fourth proportional to 113,840.30, 170,760.45 and 72,470.70 is: 108,706.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,840.30 : 170,760.45 = 72,470.70 : x
  2. Step 2: Convert to fraction form
    113,840.30/170,760.45 = 72,470.70/x
  3. Step 3: Cross multiply
    113,840.30x = 170,760.45 × 72,470.70
  4. Step 4: Simplify right side
    113,840.30x = 12,375,129,343.82
  5. Step 5: Solve for x
    x = 12,375,129,343.82/113,840.30
  6. Step 6: Final answer
    x = 108,706.05

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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.