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Finding the Fourth Proportional to 90,876.17, 125,411.90 and 49,485.90

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Solution

The fourth proportional to 90,876.17, 125,411.90 and 49,485.90 is: 68,292.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,876.17 : 125,411.90 = 49,485.90 : x
  2. Step 2: Convert to fraction form
    90,876.17/125,411.90 = 49,485.90/x
  3. Step 3: Cross multiply
    90,876.17x = 125,411.90 × 49,485.90
  4. Step 4: Simplify right side
    90,876.17x = 6,206,120,494.78
  5. Step 5: Solve for x
    x = 6,206,120,494.78/90,876.17
  6. Step 6: Final answer
    x = 68,292.06

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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.