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Finding the Fourth Proportional to 69,442.16, 104,123.12 and 61,138.85

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Solution

The fourth proportional to 69,442.16, 104,123.12 and 61,138.85 is: 91,672.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,442.16 : 104,123.12 = 61,138.85 : x
  2. Step 2: Convert to fraction form
    69,442.16/104,123.12 = 61,138.85/x
  3. Step 3: Cross multiply
    69,442.16x = 104,123.12 × 61,138.85
  4. Step 4: Simplify right side
    69,442.16x = 6,365,966,988.90
  5. Step 5: Solve for x
    x = 6,365,966,988.90/69,442.16
  6. Step 6: Final answer
    x = 91,672.95

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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.