Home / 129,788.14-179,145.93-76,084.78

Finding the Fourth Proportional to 129,788.14, 179,145.93 and 76,084.78

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Solution

The fourth proportional to 129,788.14, 179,145.93 and 76,084.78 is: 105,019.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,788.14 : 179,145.93 = 76,084.78 : x
  2. Step 2: Convert to fraction form
    129,788.14/179,145.93 = 76,084.78/x
  3. Step 3: Cross multiply
    129,788.14x = 179,145.93 × 76,084.78
  4. Step 4: Simplify right side
    129,788.14x = 13,630,278,509.40
  5. Step 5: Solve for x
    x = 13,630,278,509.40/129,788.14
  6. Step 6: Final answer
    x = 105,019.45

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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.