Home / 120,534.10-180,831.26-85,064.65

Finding the Fourth Proportional to 120,534.10, 180,831.26 and 85,064.65

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Solution

The fourth proportional to 120,534.10, 180,831.26 and 85,064.65 is: 127,618.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,534.10 : 180,831.26 = 85,064.65 : x
  2. Step 2: Convert to fraction form
    120,534.10/180,831.26 = 85,064.65/x
  3. Step 3: Cross multiply
    120,534.10x = 180,831.26 × 85,064.65
  4. Step 4: Simplify right side
    120,534.10x = 15,382,347,960.67
  5. Step 5: Solve for x
    x = 15,382,347,960.67/120,534.10
  6. Step 6: Final answer
    x = 127,618.23

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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.