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Finding the Fourth Proportional to 65,964.87, 91,015.66 and 39,113.98

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Solution

The fourth proportional to 65,964.87, 91,015.66 and 39,113.98 is: 53,967.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,964.87 : 91,015.66 = 39,113.98 : x
  2. Step 2: Convert to fraction form
    65,964.87/91,015.66 = 39,113.98/x
  3. Step 3: Cross multiply
    65,964.87x = 91,015.66 × 39,113.98
  4. Step 4: Simplify right side
    65,964.87x = 3,559,984,704.93
  5. Step 5: Solve for x
    x = 3,559,984,704.93/65,964.87
  6. Step 6: Final answer
    x = 53,967.89

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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.