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Finding the Fourth Proportional to 71,392.60, 106,959.30 and 43,658.20

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Solution

The fourth proportional to 71,392.60, 106,959.30 and 43,658.20 is: 65,408.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,392.60 : 106,959.30 = 43,658.20 : x
  2. Step 2: Convert to fraction form
    71,392.60/106,959.30 = 43,658.20/x
  3. Step 3: Cross multiply
    71,392.60x = 106,959.30 × 43,658.20
  4. Step 4: Simplify right side
    71,392.60x = 4,669,650,511.26
  5. Step 5: Solve for x
    x = 4,669,650,511.26/71,392.60
  6. Step 6: Final answer
    x = 65,408.05

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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.