Home / 55,387.20-83,080.80-31,986.30

Finding the Fourth Proportional to 55,387.20, 83,080.80 and 31,986.30

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Solution

The fourth proportional to 55,387.20, 83,080.80 and 31,986.30 is: 47,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,387.20 : 83,080.80 = 31,986.30 : x
  2. Step 2: Convert to fraction form
    55,387.20/83,080.80 = 31,986.30/x
  3. Step 3: Cross multiply
    55,387.20x = 83,080.80 × 31,986.30
  4. Step 4: Simplify right side
    55,387.20x = 2,657,447,393.04
  5. Step 5: Solve for x
    x = 2,657,447,393.04/55,387.20
  6. Step 6: Final answer
    x = 47,979.45

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Similar ratio
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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.