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Finding the Fourth Proportional to 219,139.86, 328,759.05 and 69,389.10

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Solution

The fourth proportional to 219,139.86, 328,759.05 and 69,389.10 is: 104,099.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,139.86 : 328,759.05 = 69,389.10 : x
  2. Step 2: Convert to fraction form
    219,139.86/328,759.05 = 69,389.10/x
  3. Step 3: Cross multiply
    219,139.86x = 328,759.05 × 69,389.10
  4. Step 4: Simplify right side
    219,139.86x = 22,812,294,596.36
  5. Step 5: Solve for x
    x = 22,812,294,596.36/219,139.86
  6. Step 6: Final answer
    x = 104,099.25

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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.