Home / 81,252.39-121,886.70-30,638.61

Finding the Fourth Proportional to 81,252.39, 121,886.70 and 30,638.61

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Solution

The fourth proportional to 81,252.39, 121,886.70 and 30,638.61 is: 45,960.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,252.39 : 121,886.70 = 30,638.61 : x
  2. Step 2: Convert to fraction form
    81,252.39/121,886.70 = 30,638.61/x
  3. Step 3: Cross multiply
    81,252.39x = 121,886.70 × 30,638.61
  4. Step 4: Simplify right side
    81,252.39x = 3,734,439,065.49
  5. Step 5: Solve for x
    x = 3,734,439,065.49/81,252.39
  6. Step 6: Final answer
    x = 45,960.98

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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.