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Finding the Fourth Proportional to 81,856.44, 112,960.71 and 45,557.64

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Solution

The fourth proportional to 81,856.44, 112,960.71 and 45,557.64 is: 62,868.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,856.44 : 112,960.71 = 45,557.64 : x
  2. Step 2: Convert to fraction form
    81,856.44/112,960.71 = 45,557.64/x
  3. Step 3: Cross multiply
    81,856.44x = 112,960.71 × 45,557.64
  4. Step 4: Simplify right side
    81,856.44x = 5,146,223,360.32
  5. Step 5: Solve for x
    x = 5,146,223,360.32/81,856.44
  6. Step 6: Final answer
    x = 62,868.89

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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.