Home / 81,408.12-112,408.08-54,210.72

Finding the Fourth Proportional to 81,408.12, 112,408.08 and 54,210.72

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Solution

The fourth proportional to 81,408.12, 112,408.08 and 54,210.72 is: 74,853.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,408.12 : 112,408.08 = 54,210.72 : x
  2. Step 2: Convert to fraction form
    81,408.12/112,408.08 = 54,210.72/x
  3. Step 3: Cross multiply
    81,408.12x = 112,408.08 × 54,210.72
  4. Step 4: Simplify right side
    81,408.12x = 6,093,722,950.62
  5. Step 5: Solve for x
    x = 6,093,722,950.62/81,408.12
  6. Step 6: Final answer
    x = 74,853.99

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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.