Home / 85,819.30-128,765.40-41,423.20

Finding the Fourth Proportional to 85,819.30, 128,765.40 and 41,423.20

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Solution

The fourth proportional to 85,819.30, 128,765.40 and 41,423.20 is: 62,152.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,819.30 : 128,765.40 = 41,423.20 : x
  2. Step 2: Convert to fraction form
    85,819.30/128,765.40 = 41,423.20/x
  3. Step 3: Cross multiply
    85,819.30x = 128,765.40 × 41,423.20
  4. Step 4: Simplify right side
    85,819.30x = 5,333,874,917.28
  5. Step 5: Solve for x
    x = 5,333,874,917.28/85,819.30
  6. Step 6: Final answer
    x = 62,152.39

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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.