Home / 170,734.40-255,871.20-121,428.80

Finding the Fourth Proportional to 170,734.40, 255,871.20 and 121,428.80

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Solution

The fourth proportional to 170,734.40, 255,871.20 and 121,428.80 is: 181,979.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,734.40 : 255,871.20 = 121,428.80 : x
  2. Step 2: Convert to fraction form
    170,734.40/255,871.20 = 121,428.80/x
  3. Step 3: Cross multiply
    170,734.40x = 255,871.20 × 121,428.80
  4. Step 4: Simplify right side
    170,734.40x = 31,070,132,770.56
  5. Step 5: Solve for x
    x = 31,070,132,770.56/170,734.40
  6. Step 6: Final answer
    x = 181,979.34

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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.