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Finding the Fourth Proportional to 155,530.80, 214,630.20 and 87,542.64

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Solution

The fourth proportional to 155,530.80, 214,630.20 and 87,542.64 is: 120,807.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,530.80 : 214,630.20 = 87,542.64 : x
  2. Step 2: Convert to fraction form
    155,530.80/214,630.20 = 87,542.64/x
  3. Step 3: Cross multiply
    155,530.80x = 214,630.20 × 87,542.64
  4. Step 4: Simplify right side
    155,530.80x = 18,789,294,331.73
  5. Step 5: Solve for x
    x = 18,789,294,331.73/155,530.80
  6. Step 6: Final answer
    x = 120,807.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.