Home / 129,788.73-179,077.84-78,800.45

Finding the Fourth Proportional to 129,788.73, 179,077.84 and 78,800.45

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Solution

The fourth proportional to 129,788.73, 179,077.84 and 78,800.45 is: 108,726.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,788.73 : 179,077.84 = 78,800.45 : x
  2. Step 2: Convert to fraction form
    129,788.73/179,077.84 = 78,800.45/x
  3. Step 3: Cross multiply
    129,788.73x = 179,077.84 × 78,800.45
  4. Step 4: Simplify right side
    129,788.73x = 14,111,413,284.64
  5. Step 5: Solve for x
    x = 14,111,413,284.64/129,788.73
  6. Step 6: Final answer
    x = 108,726.03

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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.