Home / 87,690.50-121,012.75-47,404.30

Finding the Fourth Proportional to 87,690.50, 121,012.75 and 47,404.30

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Solution

The fourth proportional to 87,690.50, 121,012.75 and 47,404.30 is: 65,417.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,690.50 : 121,012.75 = 47,404.30 : x
  2. Step 2: Convert to fraction form
    87,690.50/121,012.75 = 47,404.30/x
  3. Step 3: Cross multiply
    87,690.50x = 121,012.75 × 47,404.30
  4. Step 4: Simplify right side
    87,690.50x = 5,736,524,704.83
  5. Step 5: Solve for x
    x = 5,736,524,704.83/87,690.50
  6. Step 6: Final answer
    x = 65,417.86

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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.