Home / 87,859.18-121,155.05-75,154.42

Finding the Fourth Proportional to 87,859.18, 121,155.05 and 75,154.42

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Solution

The fourth proportional to 87,859.18, 121,155.05 and 75,154.42 is: 103,635.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,859.18 : 121,155.05 = 75,154.42 : x
  2. Step 2: Convert to fraction form
    87,859.18/121,155.05 = 75,154.42/x
  3. Step 3: Cross multiply
    87,859.18x = 121,155.05 × 75,154.42
  4. Step 4: Simplify right side
    87,859.18x = 9,105,337,137.05
  5. Step 5: Solve for x
    x = 9,105,337,137.05/87,859.18
  6. Step 6: Final answer
    x = 103,635.58

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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.