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Finding the Fourth Proportional to 90,291.60, 124,540.74 and 61,948.08

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Solution

The fourth proportional to 90,291.60, 124,540.74 and 61,948.08 is: 85,446.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,291.60 : 124,540.74 = 61,948.08 : x
  2. Step 2: Convert to fraction form
    90,291.60/124,540.74 = 61,948.08/x
  3. Step 3: Cross multiply
    90,291.60x = 124,540.74 × 61,948.08
  4. Step 4: Simplify right side
    90,291.60x = 7,715,059,724.78
  5. Step 5: Solve for x
    x = 7,715,059,724.78/90,291.60
  6. Step 6: Final answer
    x = 85,446.04

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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.