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Finding the Fourth Proportional to 247,890.92, 342,053.86 and 145,855.72

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Solution

The fourth proportional to 247,890.92, 342,053.86 and 145,855.72 is: 201,259.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,890.92 : 342,053.86 = 145,855.72 : x
  2. Step 2: Convert to fraction form
    247,890.92/342,053.86 = 145,855.72/x
  3. Step 3: Cross multiply
    247,890.92x = 342,053.86 × 145,855.72
  4. Step 4: Simplify right side
    247,890.92x = 49,890,512,029.08
  5. Step 5: Solve for x
    x = 49,890,512,029.08/247,890.92
  6. Step 6: Final answer
    x = 201,259.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.