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Finding the Fourth Proportional to 90,041.40, 135,062.10 and 79,932.60

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Solution

The fourth proportional to 90,041.40, 135,062.10 and 79,932.60 is: 119,898.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,041.40 : 135,062.10 = 79,932.60 : x
  2. Step 2: Convert to fraction form
    90,041.40/135,062.10 = 79,932.60/x
  3. Step 3: Cross multiply
    90,041.40x = 135,062.10 × 79,932.60
  4. Step 4: Simplify right side
    90,041.40x = 10,795,864,814.46
  5. Step 5: Solve for x
    x = 10,795,864,814.46/90,041.40
  6. Step 6: Final answer
    x = 119,898.90

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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.