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Finding the Fourth Proportional to 91,662.40, 137,507.84 and 39,072

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Solution

The fourth proportional to 91,662.40, 137,507.84 and 39,072 is: 58,614.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,662.40 : 137,507.84 = 39,072 : x
  2. Step 2: Convert to fraction form
    91,662.40/137,507.84 = 39,072/x
  3. Step 3: Cross multiply
    91,662.40x = 137,507.84 × 39,072
  4. Step 4: Simplify right side
    91,662.40x = 5,372,706,324.48
  5. Step 5: Solve for x
    x = 5,372,706,324.48/91,662.40
  6. Step 6: Final answer
    x = 58,614.07

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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.