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Finding the Fourth Proportional to 78,874.63, 108,846.16 and 43,064.53

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Solution

The fourth proportional to 78,874.63, 108,846.16 and 43,064.53 is: 59,428.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,874.63 : 108,846.16 = 43,064.53 : x
  2. Step 2: Convert to fraction form
    78,874.63/108,846.16 = 43,064.53/x
  3. Step 3: Cross multiply
    78,874.63x = 108,846.16 × 43,064.53
  4. Step 4: Simplify right side
    78,874.63x = 4,687,408,722.70
  5. Step 5: Solve for x
    x = 4,687,408,722.70/78,874.63
  6. Step 6: Final answer
    x = 59,428.60

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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.