Home / 108,021.20-162,031.80-74,778.80

Finding the Fourth Proportional to 108,021.20, 162,031.80 and 74,778.80

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Solution

The fourth proportional to 108,021.20, 162,031.80 and 74,778.80 is: 112,168.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,021.20 : 162,031.80 = 74,778.80 : x
  2. Step 2: Convert to fraction form
    108,021.20/162,031.80 = 74,778.80/x
  3. Step 3: Cross multiply
    108,021.20x = 162,031.80 × 74,778.80
  4. Step 4: Simplify right side
    108,021.20x = 12,116,543,565.84
  5. Step 5: Solve for x
    x = 12,116,543,565.84/108,021.20
  6. Step 6: Final answer
    x = 112,168.20

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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.