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Finding the Fourth Proportional to 113,186.70, 156,211.19 and 67,889.61

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Solution

The fourth proportional to 113,186.70, 156,211.19 and 67,889.61 is: 93,695.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,186.70 : 156,211.19 = 67,889.61 : x
  2. Step 2: Convert to fraction form
    113,186.70/156,211.19 = 67,889.61/x
  3. Step 3: Cross multiply
    113,186.70x = 156,211.19 × 67,889.61
  4. Step 4: Simplify right side
    113,186.70x = 10,605,116,766.74
  5. Step 5: Solve for x
    x = 10,605,116,766.74/113,186.70
  6. Step 6: Final answer
    x = 93,695.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.