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Finding the Fourth Proportional to 89,923.40, 135,030.90 and 60,471.80

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Solution

The fourth proportional to 89,923.40, 135,030.90 and 60,471.80 is: 90,805.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,923.40 : 135,030.90 = 60,471.80 : x
  2. Step 2: Convert to fraction form
    89,923.40/135,030.90 = 60,471.80/x
  3. Step 3: Cross multiply
    89,923.40x = 135,030.90 × 60,471.80
  4. Step 4: Simplify right side
    89,923.40x = 8,165,561,578.62
  5. Step 5: Solve for x
    x = 8,165,561,578.62/89,923.40
  6. Step 6: Final answer
    x = 90,805.75

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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.