Home / 120,830.09-181,275.90-85,360.73

Finding the Fourth Proportional to 120,830.09, 181,275.90 and 85,360.73

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Solution

The fourth proportional to 120,830.09, 181,275.90 and 85,360.73 is: 128,062.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,830.09 : 181,275.90 = 85,360.73 : x
  2. Step 2: Convert to fraction form
    120,830.09/181,275.90 = 85,360.73/x
  3. Step 3: Cross multiply
    120,830.09x = 181,275.90 × 85,360.73
  4. Step 4: Simplify right side
    120,830.09x = 15,473,842,249.03
  5. Step 5: Solve for x
    x = 15,473,842,249.03/120,830.09
  6. Step 6: Final answer
    x = 128,062.83

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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.