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Finding the Fourth Proportional to 70,012.81, 96,623.42 and 39,807.61

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Solution

The fourth proportional to 70,012.81, 96,623.42 and 39,807.61 is: 54,937.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,012.81 : 96,623.42 = 39,807.61 : x
  2. Step 2: Convert to fraction form
    70,012.81/96,623.42 = 39,807.61/x
  3. Step 3: Cross multiply
    70,012.81x = 96,623.42 × 39,807.61
  4. Step 4: Simplify right side
    70,012.81x = 3,846,346,979.63
  5. Step 5: Solve for x
    x = 3,846,346,979.63/70,012.81
  6. Step 6: Final answer
    x = 54,937.76

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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.