Home / 129,788.39-179,108.08-76,073.40

Finding the Fourth Proportional to 129,788.39, 179,108.08 and 76,073.40

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Solution

The fourth proportional to 129,788.39, 179,108.08 and 76,073.40 is: 104,981.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,788.39 : 179,108.08 = 76,073.40 : x
  2. Step 2: Convert to fraction form
    129,788.39/179,108.08 = 76,073.40/x
  3. Step 3: Cross multiply
    129,788.39x = 179,108.08 × 76,073.40
  4. Step 4: Simplify right side
    129,788.39x = 13,625,360,422.89
  5. Step 5: Solve for x
    x = 13,625,360,422.89/129,788.39
  6. Step 6: Final answer
    x = 104,981.35

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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.