Home / 87,909.93-121,315.64-47,623.83

Finding the Fourth Proportional to 87,909.93, 121,315.64 and 47,623.83

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Solution

The fourth proportional to 87,909.93, 121,315.64 and 47,623.83 is: 65,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,909.93 : 121,315.64 = 47,623.83 : x
  2. Step 2: Convert to fraction form
    87,909.93/121,315.64 = 47,623.83/x
  3. Step 3: Cross multiply
    87,909.93x = 121,315.64 × 47,623.83
  4. Step 4: Simplify right side
    87,909.93x = 5,777,515,415.70
  5. Step 5: Solve for x
    x = 5,777,515,415.70/87,909.93
  6. Step 6: Final answer
    x = 65,720.85

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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.