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Finding the Fourth Proportional to 219,121.40, 327,990.90 and 156,913.40

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Solution

The fourth proportional to 219,121.40, 327,990.90 and 156,913.40 is: 234,875.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,121.40 : 327,990.90 = 156,913.40 : x
  2. Step 2: Convert to fraction form
    219,121.40/327,990.90 = 156,913.40/x
  3. Step 3: Cross multiply
    219,121.40x = 327,990.90 × 156,913.40
  4. Step 4: Simplify right side
    219,121.40x = 51,466,167,288.06
  5. Step 5: Solve for x
    x = 51,466,167,288.06/219,121.40
  6. Step 6: Final answer
    x = 234,875.13

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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.