Home / 85,877.12-128,815.68-26,716.52

Finding the Fourth Proportional to 85,877.12, 128,815.68 and 26,716.52

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Solution

The fourth proportional to 85,877.12, 128,815.68 and 26,716.52 is: 40,074.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,877.12 : 128,815.68 = 26,716.52 : x
  2. Step 2: Convert to fraction form
    85,877.12/128,815.68 = 26,716.52/x
  3. Step 3: Cross multiply
    85,877.12x = 128,815.68 × 26,716.52
  4. Step 4: Simplify right side
    85,877.12x = 3,441,506,691.03
  5. Step 5: Solve for x
    x = 3,441,506,691.03/85,877.12
  6. Step 6: Final answer
    x = 40,074.78

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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.