Home / 129,992.49-179,390.82-76,278.40

Finding the Fourth Proportional to 129,992.49, 179,390.82 and 76,278.40

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Solution

The fourth proportional to 129,992.49, 179,390.82 and 76,278.40 is: 105,264.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,992.49 : 179,390.82 = 76,278.40 : x
  2. Step 2: Convert to fraction form
    129,992.49/179,390.82 = 76,278.40/x
  3. Step 3: Cross multiply
    129,992.49x = 179,390.82 × 76,278.40
  4. Step 4: Simplify right side
    129,992.49x = 13,683,643,445.94
  5. Step 5: Solve for x
    x = 13,683,643,445.94/129,992.49
  6. Step 6: Final answer
    x = 105,264.88

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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.