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Finding the Fourth Proportional to 111,125.46, 153,352.86 and 60,138

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Solution

The fourth proportional to 111,125.46, 153,352.86 and 60,138 is: 82,990.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,125.46 : 153,352.86 = 60,138 : x
  2. Step 2: Convert to fraction form
    111,125.46/153,352.86 = 60,138/x
  3. Step 3: Cross multiply
    111,125.46x = 153,352.86 × 60,138
  4. Step 4: Simplify right side
    111,125.46x = 9,222,334,294.68
  5. Step 5: Solve for x
    x = 9,222,334,294.68/111,125.46
  6. Step 6: Final answer
    x = 82,990.29

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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.