Home / 123,266.12-170,128.13-71,575.20

Finding the Fourth Proportional to 123,266.12, 170,128.13 and 71,575.20

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Solution

The fourth proportional to 123,266.12, 170,128.13 and 71,575.20 is: 98,785.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,266.12 : 170,128.13 = 71,575.20 : x
  2. Step 2: Convert to fraction form
    123,266.12/170,128.13 = 71,575.20/x
  3. Step 3: Cross multiply
    123,266.12x = 170,128.13 × 71,575.20
  4. Step 4: Simplify right side
    123,266.12x = 12,176,954,572.50
  5. Step 5: Solve for x
    x = 12,176,954,572.50/123,266.12
  6. Step 6: Final answer
    x = 98,785.90

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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.