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Finding the Fourth Proportional to 90,702.60, 125,179.72 and 54,912.34

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Solution

The fourth proportional to 90,702.60, 125,179.72 and 54,912.34 is: 75,785.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,702.60 : 125,179.72 = 54,912.34 : x
  2. Step 2: Convert to fraction form
    90,702.60/125,179.72 = 54,912.34/x
  3. Step 3: Cross multiply
    90,702.60x = 125,179.72 × 54,912.34
  4. Step 4: Simplify right side
    90,702.60x = 6,873,911,345.74
  5. Step 5: Solve for x
    x = 6,873,911,345.74/90,702.60
  6. Step 6: Final answer
    x = 75,785.16

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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.