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Finding the Fourth Proportional to 90,641.43, 125,079.39 and 50,354.46

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Solution

The fourth proportional to 90,641.43, 125,079.39 and 50,354.46 is: 69,485.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,641.43 : 125,079.39 = 50,354.46 : x
  2. Step 2: Convert to fraction form
    90,641.43/125,079.39 = 50,354.46/x
  3. Step 3: Cross multiply
    90,641.43x = 125,079.39 × 50,354.46
  4. Step 4: Simplify right side
    90,641.43x = 6,298,305,140.58
  5. Step 5: Solve for x
    x = 6,298,305,140.58/90,641.43
  6. Step 6: Final answer
    x = 69,485.94

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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.