Home / 87,137.12-120,289.05-66,986.93

Finding the Fourth Proportional to 87,137.12, 120,289.05 and 66,986.93

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Solution

The fourth proportional to 87,137.12, 120,289.05 and 66,986.93 is: 92,472.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,137.12 : 120,289.05 = 66,986.93 : x
  2. Step 2: Convert to fraction form
    87,137.12/120,289.05 = 66,986.93/x
  3. Step 3: Cross multiply
    87,137.12x = 120,289.05 × 66,986.93
  4. Step 4: Simplify right side
    87,137.12x = 8,057,793,570.67
  5. Step 5: Solve for x
    x = 8,057,793,570.67/87,137.12
  6. Step 6: Final answer
    x = 92,472.58

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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.