Home / 128,770.59-177,703.40-71,418.66

Finding the Fourth Proportional to 128,770.59, 177,703.40 and 71,418.66

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Solution

The fourth proportional to 128,770.59, 177,703.40 and 71,418.66 is: 98,557.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,770.59 : 177,703.40 = 71,418.66 : x
  2. Step 2: Convert to fraction form
    128,770.59/177,703.40 = 71,418.66/x
  3. Step 3: Cross multiply
    128,770.59x = 177,703.40 × 71,418.66
  4. Step 4: Simplify right side
    128,770.59x = 12,691,338,883.99
  5. Step 5: Solve for x
    x = 12,691,338,883.99/128,770.59
  6. Step 6: Final answer
    x = 98,557.74

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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.