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Finding the Fourth Proportional to 90,862.32, 136,395.72 and 38,316

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Solution

The fourth proportional to 90,862.32, 136,395.72 and 38,316 is: 57,517.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,862.32 : 136,395.72 = 38,316 : x
  2. Step 2: Convert to fraction form
    90,862.32/136,395.72 = 38,316/x
  3. Step 3: Cross multiply
    90,862.32x = 136,395.72 × 38,316
  4. Step 4: Simplify right side
    90,862.32x = 5,226,138,407.52
  5. Step 5: Solve for x
    x = 5,226,138,407.52/90,862.32
  6. Step 6: Final answer
    x = 57,517.11

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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.