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Finding the Fourth Proportional to 89,099.80, 133,685.70 and 39,189.40

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Solution

The fourth proportional to 89,099.80, 133,685.70 and 39,189.40 is: 58,799.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,099.80 : 133,685.70 = 39,189.40 : x
  2. Step 2: Convert to fraction form
    89,099.80/133,685.70 = 39,189.40/x
  3. Step 3: Cross multiply
    89,099.80x = 133,685.70 × 39,189.40
  4. Step 4: Simplify right side
    89,099.80x = 5,239,062,371.58
  5. Step 5: Solve for x
    x = 5,239,062,371.58/89,099.80
  6. Step 6: Final answer
    x = 58,799.93

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1.5x scale

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.