Home / 123,728.23-170,745.40-67,139.61

Finding the Fourth Proportional to 123,728.23, 170,745.40 and 67,139.61

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Solution

The fourth proportional to 123,728.23, 170,745.40 and 67,139.61 is: 92,652.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,728.23 : 170,745.40 = 67,139.61 : x
  2. Step 2: Convert to fraction form
    123,728.23/170,745.40 = 67,139.61/x
  3. Step 3: Cross multiply
    123,728.23x = 170,745.40 × 67,139.61
  4. Step 4: Simplify right side
    123,728.23x = 11,463,779,565.29
  5. Step 5: Solve for x
    x = 11,463,779,565.29/123,728.23
  6. Step 6: Final answer
    x = 92,652.90

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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.