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Finding the Fourth Proportional to 89,866.40, 134,799.60 and 61,872.80

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Solution

The fourth proportional to 89,866.40, 134,799.60 and 61,872.80 is: 92,809.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,866.40 : 134,799.60 = 61,872.80 : x
  2. Step 2: Convert to fraction form
    89,866.40/134,799.60 = 61,872.80/x
  3. Step 3: Cross multiply
    89,866.40x = 134,799.60 × 61,872.80
  4. Step 4: Simplify right side
    89,866.40x = 8,340,428,690.88
  5. Step 5: Solve for x
    x = 8,340,428,690.88/89,866.40
  6. Step 6: Final answer
    x = 92,809.20

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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.