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Finding the Fourth Proportional to 219,248.80, 329,002.80 and 78,989.20

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Solution

The fourth proportional to 219,248.80, 329,002.80 and 78,989.20 is: 118,530.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,248.80 : 329,002.80 = 78,989.20 : x
  2. Step 2: Convert to fraction form
    219,248.80/329,002.80 = 78,989.20/x
  3. Step 3: Cross multiply
    219,248.80x = 329,002.80 × 78,989.20
  4. Step 4: Simplify right side
    219,248.80x = 25,987,667,969.76
  5. Step 5: Solve for x
    x = 25,987,667,969.76/219,248.80
  6. Step 6: Final answer
    x = 118,530.49

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1.5x scale

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.