Home / 65,721.20-98,581.80-40,789.40

Finding the Fourth Proportional to 65,721.20, 98,581.80 and 40,789.40

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Solution

The fourth proportional to 65,721.20, 98,581.80 and 40,789.40 is: 61,184.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,721.20 : 98,581.80 = 40,789.40 : x
  2. Step 2: Convert to fraction form
    65,721.20/98,581.80 = 40,789.40/x
  3. Step 3: Cross multiply
    65,721.20x = 98,581.80 × 40,789.40
  4. Step 4: Simplify right side
    65,721.20x = 4,021,092,472.92
  5. Step 5: Solve for x
    x = 4,021,092,472.92/65,721.20
  6. Step 6: Final answer
    x = 61,184.10

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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.