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Finding the Fourth Proportional to 89,865.80, 134,798.70 and 61,872.20

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Solution

The fourth proportional to 89,865.80, 134,798.70 and 61,872.20 is: 92,808.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,865.80 : 134,798.70 = 61,872.20 : x
  2. Step 2: Convert to fraction form
    89,865.80/134,798.70 = 61,872.20/x
  3. Step 3: Cross multiply
    89,865.80x = 134,798.70 × 61,872.20
  4. Step 4: Simplify right side
    89,865.80x = 8,340,292,126.14
  5. Step 5: Solve for x
    x = 8,340,292,126.14/89,865.80
  6. Step 6: Final answer
    x = 92,808.30

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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.