Home / 100,788.48-139,089.15-57,767.04

Finding the Fourth Proportional to 100,788.48, 139,089.15 and 57,767.04

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Solution

The fourth proportional to 100,788.48, 139,089.15 and 57,767.04 is: 79,719.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,788.48 : 139,089.15 = 57,767.04 : x
  2. Step 2: Convert to fraction form
    100,788.48/139,089.15 = 57,767.04/x
  3. Step 3: Cross multiply
    100,788.48x = 139,089.15 × 57,767.04
  4. Step 4: Simplify right side
    100,788.48x = 8,034,768,491.62
  5. Step 5: Solve for x
    x = 8,034,768,491.62/100,788.48
  6. Step 6: Final answer
    x = 79,719.12

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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.