Home / 230,555.36-318,168.20-128,587.30

Finding the Fourth Proportional to 230,555.36, 318,168.20 and 128,587.30

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Solution

The fourth proportional to 230,555.36, 318,168.20 and 128,587.30 is: 177,451.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,555.36 : 318,168.20 = 128,587.30 : x
  2. Step 2: Convert to fraction form
    230,555.36/318,168.20 = 128,587.30/x
  3. Step 3: Cross multiply
    230,555.36x = 318,168.20 × 128,587.30
  4. Step 4: Simplify right side
    230,555.36x = 40,912,389,309.91
  5. Step 5: Solve for x
    x = 40,912,389,309.91/230,555.36
  6. Step 6: Final answer
    x = 177,451.48

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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.