Home / 120,728.07-181,129.19-57,628.71

Finding the Fourth Proportional to 120,728.07, 181,129.19 and 57,628.71

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Solution

The fourth proportional to 120,728.07, 181,129.19 and 57,628.71 is: 86,460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,728.07 : 181,129.19 = 57,628.71 : x
  2. Step 2: Convert to fraction form
    120,728.07/181,129.19 = 57,628.71/x
  3. Step 3: Cross multiply
    120,728.07x = 181,129.19 × 57,628.71
  4. Step 4: Simplify right side
    120,728.07x = 10,438,241,563.04
  5. Step 5: Solve for x
    x = 10,438,241,563.04/120,728.07
  6. Step 6: Final answer
    x = 86,460.77

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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.