Home / 129,949.16-179,328.47-76,223.88

Finding the Fourth Proportional to 129,949.16, 179,328.47 and 76,223.88

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Solution

The fourth proportional to 129,949.16, 179,328.47 and 76,223.88 is: 105,188.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,949.16 : 179,328.47 = 76,223.88 : x
  2. Step 2: Convert to fraction form
    129,949.16/179,328.47 = 76,223.88/x
  3. Step 3: Cross multiply
    129,949.16x = 179,328.47 × 76,223.88
  4. Step 4: Simplify right side
    129,949.16x = 13,669,111,396.74
  5. Step 5: Solve for x
    x = 13,669,111,396.74/129,949.16
  6. Step 6: Final answer
    x = 105,188.15

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1.5x scale

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.