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Finding the Fourth Proportional to 103,229.68, 154,851.72 and 40,900

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Solution

The fourth proportional to 103,229.68, 154,851.72 and 40,900 is: 61,352.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,229.68 : 154,851.72 = 40,900 : x
  2. Step 2: Convert to fraction form
    103,229.68/154,851.72 = 40,900/x
  3. Step 3: Cross multiply
    103,229.68x = 154,851.72 × 40,900
  4. Step 4: Simplify right side
    103,229.68x = 6,333,435,348
  5. Step 5: Solve for x
    x = 6,333,435,348/103,229.68
  6. Step 6: Final answer
    x = 61,352.85

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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.