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Finding the Fourth Proportional to 121,390.84, 182,078.92 and 45,474.40

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Solution

The fourth proportional to 121,390.84, 182,078.92 and 45,474.40 is: 68,208.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,390.84 : 182,078.92 = 45,474.40 : x
  2. Step 2: Convert to fraction form
    121,390.84/182,078.92 = 45,474.40/x
  3. Step 3: Cross multiply
    121,390.84x = 182,078.92 × 45,474.40
  4. Step 4: Simplify right side
    121,390.84x = 8,279,929,639.65
  5. Step 5: Solve for x
    x = 8,279,929,639.65/121,390.84
  6. Step 6: Final answer
    x = 68,208.85

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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.