Home / 87,909.23-121,315.05-47,622.89

Finding the Fourth Proportional to 87,909.23, 121,315.05 and 47,622.89

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Solution

The fourth proportional to 87,909.23, 121,315.05 and 47,622.89 is: 65,719.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,909.23 : 121,315.05 = 47,622.89 : x
  2. Step 2: Convert to fraction form
    87,909.23/121,315.05 = 47,622.89/x
  3. Step 3: Cross multiply
    87,909.23x = 121,315.05 × 47,622.89
  4. Step 4: Simplify right side
    87,909.23x = 5,777,373,584.78
  5. Step 5: Solve for x
    x = 5,777,373,584.78/87,909.23
  6. Step 6: Final answer
    x = 65,719.76

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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.