Home / 131,728.20-181,783.08-75,140.52

Finding the Fourth Proportional to 131,728.20, 181,783.08 and 75,140.52

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Solution

The fourth proportional to 131,728.20, 181,783.08 and 75,140.52 is: 103,692.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,728.20 : 181,783.08 = 75,140.52 : x
  2. Step 2: Convert to fraction form
    131,728.20/181,783.08 = 75,140.52/x
  3. Step 3: Cross multiply
    131,728.20x = 181,783.08 × 75,140.52
  4. Step 4: Simplify right side
    131,728.20x = 13,659,275,158.40
  5. Step 5: Solve for x
    x = 13,659,275,158.40/131,728.20
  6. Step 6: Final answer
    x = 103,692.87

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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.