Home / 128,844.50-177,824.85-78,572.66

Finding the Fourth Proportional to 128,844.50, 177,824.85 and 78,572.66

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Solution

The fourth proportional to 128,844.50, 177,824.85 and 78,572.66 is: 108,442.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,844.50 : 177,824.85 = 78,572.66 : x
  2. Step 2: Convert to fraction form
    128,844.50/177,824.85 = 78,572.66/x
  3. Step 3: Cross multiply
    128,844.50x = 177,824.85 × 78,572.66
  4. Step 4: Simplify right side
    128,844.50x = 13,972,171,478.60
  5. Step 5: Solve for x
    x = 13,972,171,478.60/128,844.50
  6. Step 6: Final answer
    x = 108,442.13

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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.