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Finding the Fourth Proportional to 90,616.64, 135,924.96 and 28,292.48

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Solution

The fourth proportional to 90,616.64, 135,924.96 and 28,292.48 is: 42,438.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,616.64 : 135,924.96 = 28,292.48 : x
  2. Step 2: Convert to fraction form
    90,616.64/135,924.96 = 28,292.48/x
  3. Step 3: Cross multiply
    90,616.64x = 135,924.96 × 28,292.48
  4. Step 4: Simplify right side
    90,616.64x = 3,845,654,212.30
  5. Step 5: Solve for x
    x = 3,845,654,212.30/90,616.64
  6. Step 6: Final answer
    x = 42,438.72

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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.