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Finding the Fourth Proportional to 323,765.60, 485,648.40 and 87,132.20

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Solution

The fourth proportional to 323,765.60, 485,648.40 and 87,132.20 is: 130,698.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,765.60 : 485,648.40 = 87,132.20 : x
  2. Step 2: Convert to fraction form
    323,765.60/485,648.40 = 87,132.20/x
  3. Step 3: Cross multiply
    323,765.60x = 485,648.40 × 87,132.20
  4. Step 4: Simplify right side
    323,765.60x = 42,315,613,518.48
  5. Step 5: Solve for x
    x = 42,315,613,518.48/323,765.60
  6. Step 6: Final answer
    x = 130,698.30

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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.