Home / 121,378.20-181,872.90-76,925.40

Finding the Fourth Proportional to 121,378.20, 181,872.90 and 76,925.40

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Solution

The fourth proportional to 121,378.20, 181,872.90 and 76,925.40 is: 115,264.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,378.20 : 181,872.90 = 76,925.40 : x
  2. Step 2: Convert to fraction form
    121,378.20/181,872.90 = 76,925.40/x
  3. Step 3: Cross multiply
    121,378.20x = 181,872.90 × 76,925.40
  4. Step 4: Simplify right side
    121,378.20x = 13,990,645,581.66
  5. Step 5: Solve for x
    x = 13,990,645,581.66/121,378.20
  6. Step 6: Final answer
    x = 115,264.90

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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.