Home / 100,788.86-139,089.68-57,767.43

Finding the Fourth Proportional to 100,788.86, 139,089.68 and 57,767.43

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Solution

The fourth proportional to 100,788.86, 139,089.68 and 57,767.43 is: 79,719.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,788.86 : 139,089.68 = 57,767.43 : x
  2. Step 2: Convert to fraction form
    100,788.86/139,089.68 = 57,767.43/x
  3. Step 3: Cross multiply
    100,788.86x = 139,089.68 × 57,767.43
  4. Step 4: Simplify right side
    100,788.86x = 8,034,853,497.54
  5. Step 5: Solve for x
    x = 8,034,853,497.54/100,788.86
  6. Step 6: Final answer
    x = 79,719.66

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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.