Home / 129,831.78-179,136.30-76,106.41

Finding the Fourth Proportional to 129,831.78, 179,136.30 and 76,106.41

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Solution

The fourth proportional to 129,831.78, 179,136.30 and 76,106.41 is: 105,008.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,831.78 : 179,136.30 = 76,106.41 : x
  2. Step 2: Convert to fraction form
    129,831.78/179,136.30 = 76,106.41/x
  3. Step 3: Cross multiply
    129,831.78x = 179,136.30 × 76,106.41
  4. Step 4: Simplify right side
    129,831.78x = 13,633,421,505.04
  5. Step 5: Solve for x
    x = 13,633,421,505.04/129,831.78
  6. Step 6: Final answer
    x = 105,008.36

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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.