Home / 102,236.14-153,150-81,211.78

Finding the Fourth Proportional to 102,236.14, 153,150 and 81,211.78

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Solution

The fourth proportional to 102,236.14, 153,150 and 81,211.78 is: 121,655.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,236.14 : 153,150 = 81,211.78 : x
  2. Step 2: Convert to fraction form
    102,236.14/153,150 = 81,211.78/x
  3. Step 3: Cross multiply
    102,236.14x = 153,150 × 81,211.78
  4. Step 4: Simplify right side
    102,236.14x = 12,437,584,107
  5. Step 5: Solve for x
    x = 12,437,584,107/102,236.14
  6. Step 6: Final answer
    x = 121,655.45

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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.