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Finding the Fourth Proportional to 247,878.81, 342,071.91 and 140,469.30

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Solution

The fourth proportional to 247,878.81, 342,071.91 and 140,469.30 is: 193,847.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,878.81 : 342,071.91 = 140,469.30 : x
  2. Step 2: Convert to fraction form
    247,878.81/342,071.91 = 140,469.30/x
  3. Step 3: Cross multiply
    247,878.81x = 342,071.91 × 140,469.30
  4. Step 4: Simplify right side
    247,878.81x = 48,050,601,747.36
  5. Step 5: Solve for x
    x = 48,050,601,747.36/247,878.81
  6. Step 6: Final answer
    x = 193,847.15

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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.