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Finding the Fourth Proportional to 90,645.61, 125,093.17 and 49,809.40

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Solution

The fourth proportional to 90,645.61, 125,093.17 and 49,809.40 is: 68,738.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,645.61 : 125,093.17 = 49,809.40 : x
  2. Step 2: Convert to fraction form
    90,645.61/125,093.17 = 49,809.40/x
  3. Step 3: Cross multiply
    90,645.61x = 125,093.17 × 49,809.40
  4. Step 4: Simplify right side
    90,645.61x = 6,230,815,773.64
  5. Step 5: Solve for x
    x = 6,230,815,773.64/90,645.61
  6. Step 6: Final answer
    x = 68,738.20

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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.