Home / 87,421.61-120,525.70-57,154.91

Finding the Fourth Proportional to 87,421.61, 120,525.70 and 57,154.91

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Solution

The fourth proportional to 87,421.61, 120,525.70 and 57,154.91 is: 78,797.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,421.61 : 120,525.70 = 57,154.91 : x
  2. Step 2: Convert to fraction form
    87,421.61/120,525.70 = 57,154.91/x
  3. Step 3: Cross multiply
    87,421.61x = 120,525.70 × 57,154.91
  4. Step 4: Simplify right side
    87,421.61x = 6,888,634,790.67
  5. Step 5: Solve for x
    x = 6,888,634,790.67/87,421.61
  6. Step 6: Final answer
    x = 78,797.85

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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.