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Finding the Fourth Proportional to 139,649.06, 192,718.01 and 75,987.18

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Solution

The fourth proportional to 139,649.06, 192,718.01 and 75,987.18 is: 104,863.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,649.06 : 192,718.01 = 75,987.18 : x
  2. Step 2: Convert to fraction form
    139,649.06/192,718.01 = 75,987.18/x
  3. Step 3: Cross multiply
    139,649.06x = 192,718.01 × 75,987.18
  4. Step 4: Simplify right side
    139,649.06x = 14,644,098,115.11
  5. Step 5: Solve for x
    x = 14,644,098,115.11/139,649.06
  6. Step 6: Final answer
    x = 104,863.56

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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.