Home / 129,711.86-178,999.98-73,123.28

Finding the Fourth Proportional to 129,711.86, 178,999.98 and 73,123.28

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Solution

The fourth proportional to 129,711.86, 178,999.98 and 73,123.28 is: 100,908.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,711.86 : 178,999.98 = 73,123.28 : x
  2. Step 2: Convert to fraction form
    129,711.86/178,999.98 = 73,123.28/x
  3. Step 3: Cross multiply
    129,711.86x = 178,999.98 × 73,123.28
  4. Step 4: Simplify right side
    129,711.86x = 13,089,065,657.53
  5. Step 5: Solve for x
    x = 13,089,065,657.53/129,711.86
  6. Step 6: Final answer
    x = 100,908.78

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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.