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Finding the Fourth Proportional to 81,338.92, 112,213.74 and 53,043.64

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Solution

The fourth proportional to 81,338.92, 112,213.74 and 53,043.64 is: 73,178.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,338.92 : 112,213.74 = 53,043.64 : x
  2. Step 2: Convert to fraction form
    81,338.92/112,213.74 = 53,043.64/x
  3. Step 3: Cross multiply
    81,338.92x = 112,213.74 × 53,043.64
  4. Step 4: Simplify right side
    81,338.92x = 5,952,225,227.61
  5. Step 5: Solve for x
    x = 5,952,225,227.61/81,338.92
  6. Step 6: Final answer
    x = 73,178.07

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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.