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Finding the Fourth Proportional to 71,707.66, 107,561.44 and 21,787.56

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Solution

The fourth proportional to 71,707.66, 107,561.44 and 21,787.56 is: 32,681.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,707.66 : 107,561.44 = 21,787.56 : x
  2. Step 2: Convert to fraction form
    71,707.66/107,561.44 = 21,787.56/x
  3. Step 3: Cross multiply
    71,707.66x = 107,561.44 × 21,787.56
  4. Step 4: Simplify right side
    71,707.66x = 2,343,501,758.28
  5. Step 5: Solve for x
    x = 2,343,501,758.28/71,707.66
  6. Step 6: Final answer
    x = 32,681.33

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1.5x scale

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.