Home / 259,077.40-388,728.96-90,718.66

Finding the Fourth Proportional to 259,077.40, 388,728.96 and 90,718.66

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Solution

The fourth proportional to 259,077.40, 388,728.96 and 90,718.66 is: 136,117.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,077.40 : 388,728.96 = 90,718.66 : x
  2. Step 2: Convert to fraction form
    259,077.40/388,728.96 = 90,718.66/x
  3. Step 3: Cross multiply
    259,077.40x = 388,728.96 × 90,718.66
  4. Step 4: Simplify right side
    259,077.40x = 35,264,970,354.39
  5. Step 5: Solve for x
    x = 35,264,970,354.39/259,077.40
  6. Step 6: Final answer
    x = 136,117.51

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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.