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Finding the Fourth Proportional to 219,429.96, 328,947.84 and 79,155.78

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Solution

The fourth proportional to 219,429.96, 328,947.84 and 79,155.78 is: 118,662.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,429.96 : 328,947.84 = 79,155.78 : x
  2. Step 2: Convert to fraction form
    219,429.96/328,947.84 = 79,155.78/x
  3. Step 3: Cross multiply
    219,429.96x = 328,947.84 × 79,155.78
  4. Step 4: Simplify right side
    219,429.96x = 26,038,122,854.52
  5. Step 5: Solve for x
    x = 26,038,122,854.52/219,429.96
  6. Step 6: Final answer
    x = 118,662.57

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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.