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Finding the Fourth Proportional to 69,315.81, 103,973.72 and 27,215.72

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Solution

The fourth proportional to 69,315.81, 103,973.72 and 27,215.72 is: 40,823.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,315.81 : 103,973.72 = 27,215.72 : x
  2. Step 2: Convert to fraction form
    69,315.81/103,973.72 = 27,215.72/x
  3. Step 3: Cross multiply
    69,315.81x = 103,973.72 × 27,215.72
  4. Step 4: Simplify right side
    69,315.81x = 2,829,718,994.93
  5. Step 5: Solve for x
    x = 2,829,718,994.93/69,315.81
  6. Step 6: Final answer
    x = 40,823.57

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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.