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Finding the Fourth Proportional to 89,287.20, 133,930.80 and 87,904.80

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Solution

The fourth proportional to 89,287.20, 133,930.80 and 87,904.80 is: 131,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,287.20 : 133,930.80 = 87,904.80 : x
  2. Step 2: Convert to fraction form
    89,287.20/133,930.80 = 87,904.80/x
  3. Step 3: Cross multiply
    89,287.20x = 133,930.80 × 87,904.80
  4. Step 4: Simplify right side
    89,287.20x = 11,773,160,187.84
  5. Step 5: Solve for x
    x = 11,773,160,187.84/89,287.20
  6. Step 6: Final answer
    x = 131,857.20

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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.