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Finding the Fourth Proportional to 219,660.30, 329,365.53 and 86,468.40

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Solution

The fourth proportional to 219,660.30, 329,365.53 and 86,468.40 is: 129,653.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,660.30 : 329,365.53 = 86,468.40 : x
  2. Step 2: Convert to fraction form
    219,660.30/329,365.53 = 86,468.40/x
  3. Step 3: Cross multiply
    219,660.30x = 329,365.53 × 86,468.40
  4. Step 4: Simplify right side
    219,660.30x = 28,479,710,394.25
  5. Step 5: Solve for x
    x = 28,479,710,394.25/219,660.30
  6. Step 6: Final answer
    x = 129,653.43

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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.