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Finding the Fourth Proportional to 90,638, 125,095.42 and 75,506.69

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Solution

The fourth proportional to 90,638, 125,095.42 and 75,506.69 is: 104,211.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,638 : 125,095.42 = 75,506.69 : x
  2. Step 2: Convert to fraction form
    90,638/125,095.42 = 75,506.69/x
  3. Step 3: Cross multiply
    90,638x = 125,095.42 × 75,506.69
  4. Step 4: Simplify right side
    90,638x = 9,445,541,098.36
  5. Step 5: Solve for x
    x = 9,445,541,098.36/90,638
  6. Step 6: Final answer
    x = 104,211.71

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1.5x scale

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.