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Finding the Fourth Proportional to 90,780.60, 136,170.90 and 44,124.60

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Solution

The fourth proportional to 90,780.60, 136,170.90 and 44,124.60 is: 66,186.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,780.60 : 136,170.90 = 44,124.60 : x
  2. Step 2: Convert to fraction form
    90,780.60/136,170.90 = 44,124.60/x
  3. Step 3: Cross multiply
    90,780.60x = 136,170.90 × 44,124.60
  4. Step 4: Simplify right side
    90,780.60x = 6,008,486,494.14
  5. Step 5: Solve for x
    x = 6,008,486,494.14/90,780.60
  6. Step 6: Final answer
    x = 66,186.90

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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.