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Finding the Fourth Proportional to 111,854.12, 154,391.27 and 89,349.89

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Solution

The fourth proportional to 111,854.12, 154,391.27 and 89,349.89 is: 123,328.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,854.12 : 154,391.27 = 89,349.89 : x
  2. Step 2: Convert to fraction form
    111,854.12/154,391.27 = 89,349.89/x
  3. Step 3: Cross multiply
    111,854.12x = 154,391.27 × 89,349.89
  4. Step 4: Simplify right side
    111,854.12x = 13,794,841,772.75
  5. Step 5: Solve for x
    x = 13,794,841,772.75/111,854.12
  6. Step 6: Final answer
    x = 123,328.87

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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.