Home / 129,712.36-179,000.67-73,123.78

Finding the Fourth Proportional to 129,712.36, 179,000.67 and 73,123.78

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Solution

The fourth proportional to 129,712.36, 179,000.67 and 73,123.78 is: 100,909.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,712.36 : 179,000.67 = 73,123.78 : x
  2. Step 2: Convert to fraction form
    129,712.36/179,000.67 = 73,123.78/x
  3. Step 3: Cross multiply
    129,712.36x = 179,000.67 × 73,123.78
  4. Step 4: Simplify right side
    129,712.36x = 13,089,205,612.93
  5. Step 5: Solve for x
    x = 13,089,205,612.93/129,712.36
  6. Step 6: Final answer
    x = 100,909.47

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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.