Home / 135,782.40-187,337.28-78,414.40

Finding the Fourth Proportional to 135,782.40, 187,337.28 and 78,414.40

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Solution

The fourth proportional to 135,782.40, 187,337.28 and 78,414.40 is: 108,187.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,782.40 : 187,337.28 = 78,414.40 : x
  2. Step 2: Convert to fraction form
    135,782.40/187,337.28 = 78,414.40/x
  3. Step 3: Cross multiply
    135,782.40x = 187,337.28 × 78,414.40
  4. Step 4: Simplify right side
    135,782.40x = 14,689,940,408.83
  5. Step 5: Solve for x
    x = 14,689,940,408.83/135,782.40
  6. Step 6: Final answer
    x = 108,187.37

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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.