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Finding the Fourth Proportional to 90,684.90, 125,125.83 and 54,867.78

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Solution

The fourth proportional to 90,684.90, 125,125.83 and 54,867.78 is: 75,705.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,684.90 : 125,125.83 = 54,867.78 : x
  2. Step 2: Convert to fraction form
    90,684.90/125,125.83 = 54,867.78/x
  3. Step 3: Cross multiply
    90,684.90x = 125,125.83 × 54,867.78
  4. Step 4: Simplify right side
    90,684.90x = 6,865,376,512.76
  5. Step 5: Solve for x
    x = 6,865,376,512.76/90,684.90
  6. Step 6: Final answer
    x = 75,705.84

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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.