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Finding the Fourth Proportional to 65,972.71, 91,040.09 and 39,099.31

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Solution

The fourth proportional to 65,972.71, 91,040.09 and 39,099.31 is: 53,955.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,972.71 : 91,040.09 = 39,099.31 : x
  2. Step 2: Convert to fraction form
    65,972.71/91,040.09 = 39,099.31/x
  3. Step 3: Cross multiply
    65,972.71x = 91,040.09 × 39,099.31
  4. Step 4: Simplify right side
    65,972.71x = 3,559,604,278.24
  5. Step 5: Solve for x
    x = 3,559,604,278.24/65,972.71
  6. Step 6: Final answer
    x = 53,955.71

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1.5x scale

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.