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Finding the Fourth Proportional to 90,879.17, 125,416.04 and 49,488.90

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Solution

The fourth proportional to 90,879.17, 125,416.04 and 49,488.90 is: 68,296.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,879.17 : 125,416.04 = 49,488.90 : x
  2. Step 2: Convert to fraction form
    90,879.17/125,416.04 = 49,488.90/x
  3. Step 3: Cross multiply
    90,879.17x = 125,416.04 × 49,488.90
  4. Step 4: Simplify right side
    90,879.17x = 6,206,701,861.96
  5. Step 5: Solve for x
    x = 6,206,701,861.96/90,879.17
  6. Step 6: Final answer
    x = 68,296.20

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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.