Home / 87,909.36-121,315.50-47,623.12

Finding the Fourth Proportional to 87,909.36, 121,315.50 and 47,623.12

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Solution

The fourth proportional to 87,909.36, 121,315.50 and 47,623.12 is: 65,720.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,909.36 : 121,315.50 = 47,623.12 : x
  2. Step 2: Convert to fraction form
    87,909.36/121,315.50 = 47,623.12/x
  3. Step 3: Cross multiply
    87,909.36x = 121,315.50 × 47,623.12
  4. Step 4: Simplify right side
    87,909.36x = 5,777,422,614.36
  5. Step 5: Solve for x
    x = 5,777,422,614.36/87,909.36
  6. Step 6: Final answer
    x = 65,720.22

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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.