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Finding the Fourth Proportional to 89,805.40, 134,708.10 and 82,515.40

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Solution

The fourth proportional to 89,805.40, 134,708.10 and 82,515.40 is: 123,773.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,805.40 : 134,708.10 = 82,515.40 : x
  2. Step 2: Convert to fraction form
    89,805.40/134,708.10 = 82,515.40/x
  3. Step 3: Cross multiply
    89,805.40x = 134,708.10 × 82,515.40
  4. Step 4: Simplify right side
    89,805.40x = 11,115,492,754.74
  5. Step 5: Solve for x
    x = 11,115,492,754.74/89,805.40
  6. Step 6: Final answer
    x = 123,773.10

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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.