Home / 391,018.11-586,590.43-121,082.79

Finding the Fourth Proportional to 391,018.11, 586,590.43 and 121,082.79

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Solution

The fourth proportional to 391,018.11, 586,590.43 and 121,082.79 is: 181,643.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,018.11 : 586,590.43 = 121,082.79 : x
  2. Step 2: Convert to fraction form
    391,018.11/586,590.43 = 121,082.79/x
  3. Step 3: Cross multiply
    391,018.11x = 586,590.43 × 121,082.79
  4. Step 4: Simplify right side
    391,018.11x = 71,026,005,851.70
  5. Step 5: Solve for x
    x = 71,026,005,851.70/391,018.11
  6. Step 6: Final answer
    x = 181,643.78

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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.