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Finding the Fourth Proportional to 219,545.40, 329,318.10 and 79,308.60

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Solution

The fourth proportional to 219,545.40, 329,318.10 and 79,308.60 is: 118,962.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,545.40 : 329,318.10 = 79,308.60 : x
  2. Step 2: Convert to fraction form
    219,545.40/329,318.10 = 79,308.60/x
  3. Step 3: Cross multiply
    219,545.40x = 329,318.10 × 79,308.60
  4. Step 4: Simplify right side
    219,545.40x = 26,117,757,465.66
  5. Step 5: Solve for x
    x = 26,117,757,465.66/219,545.40
  6. Step 6: Final answer
    x = 118,962.90

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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.