Home / 258,122.34-387,238.18-80,642.73

Finding the Fourth Proportional to 258,122.34, 387,238.18 and 80,642.73

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Solution

The fourth proportional to 258,122.34, 387,238.18 and 80,642.73 is: 120,981.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,122.34 : 387,238.18 = 80,642.73 : x
  2. Step 2: Convert to fraction form
    258,122.34/387,238.18 = 80,642.73/x
  3. Step 3: Cross multiply
    258,122.34x = 387,238.18 × 80,642.73
  4. Step 4: Simplify right side
    258,122.34x = 31,227,943,793.82
  5. Step 5: Solve for x
    x = 31,227,943,793.82/258,122.34
  6. Step 6: Final answer
    x = 120,981.17

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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.