Home / 87,315.80-120,511.56-51,503.68

Finding the Fourth Proportional to 87,315.80, 120,511.56 and 51,503.68

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Solution

The fourth proportional to 87,315.80, 120,511.56 and 51,503.68 is: 71,084.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,315.80 : 120,511.56 = 51,503.68 : x
  2. Step 2: Convert to fraction form
    87,315.80/120,511.56 = 51,503.68/x
  3. Step 3: Cross multiply
    87,315.80x = 120,511.56 × 51,503.68
  4. Step 4: Simplify right side
    87,315.80x = 6,206,788,822.54
  5. Step 5: Solve for x
    x = 6,206,788,822.54/87,315.80
  6. Step 6: Final answer
    x = 71,084.37

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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.