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Finding the Fourth Proportional to 90,864.88, 135,616.88 and 84,886.16

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Solution

The fourth proportional to 90,864.88, 135,616.88 and 84,886.16 is: 126,693.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,864.88 : 135,616.88 = 84,886.16 : x
  2. Step 2: Convert to fraction form
    90,864.88/135,616.88 = 84,886.16/x
  3. Step 3: Cross multiply
    90,864.88x = 135,616.88 × 84,886.16
  4. Step 4: Simplify right side
    90,864.88x = 11,511,996,174.38
  5. Step 5: Solve for x
    x = 11,511,996,174.38/90,864.88
  6. Step 6: Final answer
    x = 126,693.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.