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Finding the Fourth Proportional to 109,422.62, 150,994.14 and 61,687.70

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Solution

The fourth proportional to 109,422.62, 150,994.14 and 61,687.70 is: 85,123.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,422.62 : 150,994.14 = 61,687.70 : x
  2. Step 2: Convert to fraction form
    109,422.62/150,994.14 = 61,687.70/x
  3. Step 3: Cross multiply
    109,422.62x = 150,994.14 × 61,687.70
  4. Step 4: Simplify right side
    109,422.62x = 9,314,480,455.11
  5. Step 5: Solve for x
    x = 9,314,480,455.11/109,422.62
  6. Step 6: Final answer
    x = 85,123.91

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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.