Home / 123,447.12-170,197.92-100,762.80

Finding the Fourth Proportional to 123,447.12, 170,197.92 and 100,762.80

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Solution

The fourth proportional to 123,447.12, 170,197.92 and 100,762.80 is: 138,922.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,447.12 : 170,197.92 = 100,762.80 : x
  2. Step 2: Convert to fraction form
    123,447.12/170,197.92 = 100,762.80/x
  3. Step 3: Cross multiply
    123,447.12x = 170,197.92 × 100,762.80
  4. Step 4: Simplify right side
    123,447.12x = 17,149,618,973.38
  5. Step 5: Solve for x
    x = 17,149,618,973.38/123,447.12
  6. Step 6: Final answer
    x = 138,922.80

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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.