Home / 138,744.08-208,031.85-54,403.20

Finding the Fourth Proportional to 138,744.08, 208,031.85 and 54,403.20

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Solution

The fourth proportional to 138,744.08, 208,031.85 and 54,403.20 is: 81,571.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,744.08 : 208,031.85 = 54,403.20 : x
  2. Step 2: Convert to fraction form
    138,744.08/208,031.85 = 54,403.20/x
  3. Step 3: Cross multiply
    138,744.08x = 208,031.85 × 54,403.20
  4. Step 4: Simplify right side
    138,744.08x = 11,317,598,341.92
  5. Step 5: Solve for x
    x = 11,317,598,341.92/138,744.08
  6. Step 6: Final answer
    x = 81,571.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.