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Finding the Fourth Proportional to 90,418.68, 135,646.65 and 31,246.56

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Solution

The fourth proportional to 90,418.68, 135,646.65 and 31,246.56 is: 46,876.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,418.68 : 135,646.65 = 31,246.56 : x
  2. Step 2: Convert to fraction form
    90,418.68/135,646.65 = 31,246.56/x
  3. Step 3: Cross multiply
    90,418.68x = 135,646.65 × 31,246.56
  4. Step 4: Simplify right side
    90,418.68x = 4,238,491,188.02
  5. Step 5: Solve for x
    x = 4,238,491,188.02/90,418.68
  6. Step 6: Final answer
    x = 46,876.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.