Home / 121,278.20-181,917.30-85,848.80

Finding the Fourth Proportional to 121,278.20, 181,917.30 and 85,848.80

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Solution

The fourth proportional to 121,278.20, 181,917.30 and 85,848.80 is: 128,773.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,278.20 : 181,917.30 = 85,848.80 : x
  2. Step 2: Convert to fraction form
    121,278.20/181,917.30 = 85,848.80/x
  3. Step 3: Cross multiply
    121,278.20x = 181,917.30 × 85,848.80
  4. Step 4: Simplify right side
    121,278.20x = 15,617,381,904.24
  5. Step 5: Solve for x
    x = 15,617,381,904.24/121,278.20
  6. Step 6: Final answer
    x = 128,773.20

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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.