Home / 129,997.58-179,223.18-103,228.70

Finding the Fourth Proportional to 129,997.58, 179,223.18 and 103,228.70

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Solution

The fourth proportional to 129,997.58, 179,223.18 and 103,228.70 is: 142,317.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,997.58 : 179,223.18 = 103,228.70 : x
  2. Step 2: Convert to fraction form
    129,997.58/179,223.18 = 103,228.70/x
  3. Step 3: Cross multiply
    129,997.58x = 179,223.18 × 103,228.70
  4. Step 4: Simplify right side
    129,997.58x = 18,500,975,881.27
  5. Step 5: Solve for x
    x = 18,500,975,881.27/129,997.58
  6. Step 6: Final answer
    x = 142,317.85

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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.