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Finding the Fourth Proportional to 90,702.90, 125,150.67 and 54,885.78

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Solution

The fourth proportional to 90,702.90, 125,150.67 and 54,885.78 is: 75,730.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,702.90 : 125,150.67 = 54,885.78 : x
  2. Step 2: Convert to fraction form
    90,702.90/125,150.67 = 54,885.78/x
  3. Step 3: Cross multiply
    90,702.90x = 125,150.67 × 54,885.78
  4. Step 4: Simplify right side
    90,702.90x = 6,868,992,140.47
  5. Step 5: Solve for x
    x = 6,868,992,140.47/90,702.90
  6. Step 6: Final answer
    x = 75,730.68

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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.