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Finding the Fourth Proportional to 91,169.20, 136,656.60 and 34,987.60

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Solution

The fourth proportional to 91,169.20, 136,656.60 and 34,987.60 is: 52,444.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,169.20 : 136,656.60 = 34,987.60 : x
  2. Step 2: Convert to fraction form
    91,169.20/136,656.60 = 34,987.60/x
  3. Step 3: Cross multiply
    91,169.20x = 136,656.60 × 34,987.60
  4. Step 4: Simplify right side
    91,169.20x = 4,781,286,458.16
  5. Step 5: Solve for x
    x = 4,781,286,458.16/91,169.20
  6. Step 6: Final answer
    x = 52,444.10

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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.