Home / 85,890.38-128,854.80-25,919.90

Finding the Fourth Proportional to 85,890.38, 128,854.80 and 25,919.90

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Solution

The fourth proportional to 85,890.38, 128,854.80 and 25,919.90 is: 38,885.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890.38 : 128,854.80 = 25,919.90 : x
  2. Step 2: Convert to fraction form
    85,890.38/128,854.80 = 25,919.90/x
  3. Step 3: Cross multiply
    85,890.38x = 128,854.80 × 25,919.90
  4. Step 4: Simplify right side
    85,890.38x = 3,339,903,530.52
  5. Step 5: Solve for x
    x = 3,339,903,530.52/85,890.38
  6. Step 6: Final answer
    x = 38,885.65

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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.