Home / 128,868.49-177,780.23-83,557.95

Finding the Fourth Proportional to 128,868.49, 177,780.23 and 83,557.95

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Solution

The fourth proportional to 128,868.49, 177,780.23 and 83,557.95 is: 115,272.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,868.49 : 177,780.23 = 83,557.95 : x
  2. Step 2: Convert to fraction form
    128,868.49/177,780.23 = 83,557.95/x
  3. Step 3: Cross multiply
    128,868.49x = 177,780.23 × 83,557.95
  4. Step 4: Simplify right side
    128,868.49x = 14,854,951,569.33
  5. Step 5: Solve for x
    x = 14,854,951,569.33/128,868.49
  6. Step 6: Final answer
    x = 115,272.18

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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.