Home / 87,689.77-131,520.07-31,518.49

Finding the Fourth Proportional to 87,689.77, 131,520.07 and 31,518.49

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Solution

The fourth proportional to 87,689.77, 131,520.07 and 31,518.49 is: 47,272.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689.77 : 131,520.07 = 31,518.49 : x
  2. Step 2: Convert to fraction form
    87,689.77/131,520.07 = 31,518.49/x
  3. Step 3: Cross multiply
    87,689.77x = 131,520.07 × 31,518.49
  4. Step 4: Simplify right side
    87,689.77x = 4,145,314,011.09
  5. Step 5: Solve for x
    x = 4,145,314,011.09/87,689.77
  6. Step 6: Final answer
    x = 47,272.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.