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Finding the Fourth Proportional to 81,245.68, 112,124.76 and 45,439.03

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Solution

The fourth proportional to 81,245.68, 112,124.76 and 45,439.03 is: 62,709.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,245.68 : 112,124.76 = 45,439.03 : x
  2. Step 2: Convert to fraction form
    81,245.68/112,124.76 = 45,439.03/x
  3. Step 3: Cross multiply
    81,245.68x = 112,124.76 × 45,439.03
  4. Step 4: Simplify right side
    81,245.68x = 5,094,839,672.44
  5. Step 5: Solve for x
    x = 5,094,839,672.44/81,245.68
  6. Step 6: Final answer
    x = 62,709.05

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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.