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Finding the Fourth Proportional to 70,616.72, 105,928.72 and 18,026.66

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Solution

The fourth proportional to 70,616.72, 105,928.72 and 18,026.66 is: 27,040.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,616.72 : 105,928.72 = 18,026.66 : x
  2. Step 2: Convert to fraction form
    70,616.72/105,928.72 = 18,026.66/x
  3. Step 3: Cross multiply
    70,616.72x = 105,928.72 × 18,026.66
  4. Step 4: Simplify right side
    70,616.72x = 1,909,541,239.43
  5. Step 5: Solve for x
    x = 1,909,541,239.43/70,616.72
  6. Step 6: Final answer
    x = 27,040.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.