Home / 129,788.16-179,089.92-79,476.48

Finding the Fourth Proportional to 129,788.16, 179,089.92 and 79,476.48

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Solution

The fourth proportional to 129,788.16, 179,089.92 and 79,476.48 is: 109,666.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,788.16 : 179,089.92 = 79,476.48 : x
  2. Step 2: Convert to fraction form
    129,788.16/179,089.92 = 79,476.48/x
  3. Step 3: Cross multiply
    129,788.16x = 179,089.92 × 79,476.48
  4. Step 4: Simplify right side
    129,788.16x = 14,233,436,445.08
  5. Step 5: Solve for x
    x = 14,233,436,445.08/129,788.16
  6. Step 6: Final answer
    x = 109,666.68

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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.