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Finding the Fourth Proportional to 78,846.64, 118,288.80 and 26,256.56

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Solution

The fourth proportional to 78,846.64, 118,288.80 and 26,256.56 is: 39,391.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,846.64 : 118,288.80 = 26,256.56 : x
  2. Step 2: Convert to fraction form
    78,846.64/118,288.80 = 26,256.56/x
  3. Step 3: Cross multiply
    78,846.64x = 118,288.80 × 26,256.56
  4. Step 4: Simplify right side
    78,846.64x = 3,105,856,974.53
  5. Step 5: Solve for x
    x = 3,105,856,974.53/78,846.64
  6. Step 6: Final answer
    x = 39,391.11

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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.