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Finding the Fourth Proportional to 90,962.30, 136,458.03 and 38,379.53

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Solution

The fourth proportional to 90,962.30, 136,458.03 and 38,379.53 is: 57,575.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,962.30 : 136,458.03 = 38,379.53 : x
  2. Step 2: Convert to fraction form
    90,962.30/136,458.03 = 38,379.53/x
  3. Step 3: Cross multiply
    90,962.30x = 136,458.03 × 38,379.53
  4. Step 4: Simplify right side
    90,962.30x = 5,237,195,056.13
  5. Step 5: Solve for x
    x = 5,237,195,056.13/90,962.30
  6. Step 6: Final answer
    x = 57,575.45

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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.