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Finding the Fourth Proportional to 99,692.10, 137,621.17 and 61,458.48

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Solution

The fourth proportional to 99,692.10, 137,621.17 and 61,458.48 is: 84,841.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,692.10 : 137,621.17 = 61,458.48 : x
  2. Step 2: Convert to fraction form
    99,692.10/137,621.17 = 61,458.48/x
  3. Step 3: Cross multiply
    99,692.10x = 137,621.17 × 61,458.48
  4. Step 4: Simplify right side
    99,692.10x = 8,457,987,770.38
  5. Step 5: Solve for x
    x = 8,457,987,770.38/99,692.10
  6. Step 6: Final answer
    x = 84,841.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.