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Finding the Fourth Proportional to 113,425.40, 170,138.10 and 51,217.40

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Solution

The fourth proportional to 113,425.40, 170,138.10 and 51,217.40 is: 76,826.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,425.40 : 170,138.10 = 51,217.40 : x
  2. Step 2: Convert to fraction form
    113,425.40/170,138.10 = 51,217.40/x
  3. Step 3: Cross multiply
    113,425.40x = 170,138.10 × 51,217.40
  4. Step 4: Simplify right side
    113,425.40x = 8,714,031,122.94
  5. Step 5: Solve for x
    x = 8,714,031,122.94/113,425.40
  6. Step 6: Final answer
    x = 76,826.10

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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.