Home / 85,421.70-128,046.78-29,223.36

Finding the Fourth Proportional to 85,421.70, 128,046.78 and 29,223.36

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Solution

The fourth proportional to 85,421.70, 128,046.78 and 29,223.36 is: 43,805.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,421.70 : 128,046.78 = 29,223.36 : x
  2. Step 2: Convert to fraction form
    85,421.70/128,046.78 = 29,223.36/x
  3. Step 3: Cross multiply
    85,421.70x = 128,046.78 × 29,223.36
  4. Step 4: Simplify right side
    85,421.70x = 3,741,957,148.78
  5. Step 5: Solve for x
    x = 3,741,957,148.78/85,421.70
  6. Step 6: Final answer
    x = 43,805.70

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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.