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Finding the Fourth Proportional to 124,427.40, 171,647.40 and 79,031.34

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Solution

The fourth proportional to 124,427.40, 171,647.40 and 79,031.34 is: 109,023.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,427.40 : 171,647.40 = 79,031.34 : x
  2. Step 2: Convert to fraction form
    124,427.40/171,647.40 = 79,031.34/x
  3. Step 3: Cross multiply
    124,427.40x = 171,647.40 × 79,031.34
  4. Step 4: Simplify right side
    124,427.40x = 13,565,524,029.52
  5. Step 5: Solve for x
    x = 13,565,524,029.52/124,427.40
  6. Step 6: Final answer
    x = 109,023.61

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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.