Home / 129,902.95-179,200.02-78,902.11

Finding the Fourth Proportional to 129,902.95, 179,200.02 and 78,902.11

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Solution

The fourth proportional to 129,902.95, 179,200.02 and 78,902.11 is: 108,844.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,902.95 : 179,200.02 = 78,902.11 : x
  2. Step 2: Convert to fraction form
    129,902.95/179,200.02 = 78,902.11/x
  3. Step 3: Cross multiply
    129,902.95x = 179,200.02 × 78,902.11
  4. Step 4: Simplify right side
    129,902.95x = 14,139,258,794.04
  5. Step 5: Solve for x
    x = 14,139,258,794.04/129,902.95
  6. Step 6: Final answer
    x = 108,844.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.