Home / 87,987.43-121,378.10-55,667.82

Finding the Fourth Proportional to 87,987.43, 121,378.10 and 55,667.82

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Solution

The fourth proportional to 87,987.43, 121,378.10 and 55,667.82 is: 76,793.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,987.43 : 121,378.10 = 55,667.82 : x
  2. Step 2: Convert to fraction form
    87,987.43/121,378.10 = 55,667.82/x
  3. Step 3: Cross multiply
    87,987.43x = 121,378.10 × 55,667.82
  4. Step 4: Simplify right side
    87,987.43x = 6,756,854,399.57
  5. Step 5: Solve for x
    x = 6,756,854,399.57/87,987.43
  6. Step 6: Final answer
    x = 76,793.40

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1.5x scale

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.