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Finding the Fourth Proportional to 65,990.50, 99,002.27 and 19,243.38

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Solution

The fourth proportional to 65,990.50, 99,002.27 and 19,243.38 is: 28,869.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,990.50 : 99,002.27 = 19,243.38 : x
  2. Step 2: Convert to fraction form
    65,990.50/99,002.27 = 19,243.38/x
  3. Step 3: Cross multiply
    65,990.50x = 99,002.27 × 19,243.38
  4. Step 4: Simplify right side
    65,990.50x = 1,905,138,302.47
  5. Step 5: Solve for x
    x = 1,905,138,302.47/65,990.50
  6. Step 6: Final answer
    x = 28,869.89

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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.