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Finding the Fourth Proportional to 81,369.52, 112,284.28 and 54,507.68

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Solution

The fourth proportional to 81,369.52, 112,284.28 and 54,507.68 is: 75,216.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,369.52 : 112,284.28 = 54,507.68 : x
  2. Step 2: Convert to fraction form
    81,369.52/112,284.28 = 54,507.68/x
  3. Step 3: Cross multiply
    81,369.52x = 112,284.28 × 54,507.68
  4. Step 4: Simplify right side
    81,369.52x = 6,120,355,603.27
  5. Step 5: Solve for x
    x = 6,120,355,603.27/81,369.52
  6. Step 6: Final answer
    x = 75,216.81

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1.5x scale

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.