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Finding the Fourth Proportional to 65,989.75, 99,001.13 and 19,242.63

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Solution

The fourth proportional to 65,989.75, 99,001.13 and 19,242.63 is: 28,868.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,989.75 : 99,001.13 = 19,242.63 : x
  2. Step 2: Convert to fraction form
    65,989.75/99,001.13 = 19,242.63/x
  3. Step 3: Cross multiply
    65,989.75x = 99,001.13 × 19,242.63
  4. Step 4: Simplify right side
    65,989.75x = 1,905,042,114.17
  5. Step 5: Solve for x
    x = 1,905,042,114.17/65,989.75
  6. Step 6: Final answer
    x = 28,868.76

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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.