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Finding the Fourth Proportional to 90,891.86, 136,356.22 and 38,301.32

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Solution

The fourth proportional to 90,891.86, 136,356.22 and 38,301.32 is: 57,459.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,891.86 : 136,356.22 = 38,301.32 : x
  2. Step 2: Convert to fraction form
    90,891.86/136,356.22 = 38,301.32/x
  3. Step 3: Cross multiply
    90,891.86x = 136,356.22 × 38,301.32
  4. Step 4: Simplify right side
    90,891.86x = 5,222,623,216.21
  5. Step 5: Solve for x
    x = 5,222,623,216.21/90,891.86
  6. Step 6: Final answer
    x = 57,459.75

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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.