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Finding the Fourth Proportional to 81,478.72, 112,440.28 and 45,668.74

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Solution

The fourth proportional to 81,478.72, 112,440.28 and 45,668.74 is: 63,022.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,478.72 : 112,440.28 = 45,668.74 : x
  2. Step 2: Convert to fraction form
    81,478.72/112,440.28 = 45,668.74/x
  3. Step 3: Cross multiply
    81,478.72x = 112,440.28 × 45,668.74
  4. Step 4: Simplify right side
    81,478.72x = 5,135,005,912.85
  5. Step 5: Solve for x
    x = 5,135,005,912.85/81,478.72
  6. Step 6: Final answer
    x = 63,022.66

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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.