Home / 87,989.10-131,995.80-31,815.60

Finding the Fourth Proportional to 87,989.10, 131,995.80 and 31,815.60

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Solution

The fourth proportional to 87,989.10, 131,995.80 and 31,815.60 is: 47,727.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,989.10 : 131,995.80 = 31,815.60 : x
  2. Step 2: Convert to fraction form
    87,989.10/131,995.80 = 31,815.60/x
  3. Step 3: Cross multiply
    87,989.10x = 131,995.80 × 31,815.60
  4. Step 4: Simplify right side
    87,989.10x = 4,199,525,574.48
  5. Step 5: Solve for x
    x = 4,199,525,574.48/87,989.10
  6. Step 6: Final answer
    x = 47,727.79

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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.