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Finding the Fourth Proportional to 118,729.99, 163,839.88 and 65,015.65

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Solution

The fourth proportional to 118,729.99, 163,839.88 and 65,015.65 is: 89,717.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,729.99 : 163,839.88 = 65,015.65 : x
  2. Step 2: Convert to fraction form
    118,729.99/163,839.88 = 65,015.65/x
  3. Step 3: Cross multiply
    118,729.99x = 163,839.88 × 65,015.65
  4. Step 4: Simplify right side
    118,729.99x = 10,652,156,294.12
  5. Step 5: Solve for x
    x = 10,652,156,294.12/118,729.99
  6. Step 6: Final answer
    x = 89,717.49

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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.