Home / 65,132.20-89,835.78-39,989.80

Finding the Fourth Proportional to 65,132.20, 89,835.78 and 39,989.80

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Solution

The fourth proportional to 65,132.20, 89,835.78 and 39,989.80 is: 55,157.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,132.20 : 89,835.78 = 39,989.80 : x
  2. Step 2: Convert to fraction form
    65,132.20/89,835.78 = 39,989.80/x
  3. Step 3: Cross multiply
    65,132.20x = 89,835.78 × 39,989.80
  4. Step 4: Simplify right side
    65,132.20x = 3,592,514,875.04
  5. Step 5: Solve for x
    x = 3,592,514,875.04/65,132.20
  6. Step 6: Final answer
    x = 55,157.28

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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.