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Finding the Fourth Proportional to 118,681.65, 163,778.49 and 64,965.69

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Solution

The fourth proportional to 118,681.65, 163,778.49 and 64,965.69 is: 89,651.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,681.65 : 163,778.49 = 64,965.69 : x
  2. Step 2: Convert to fraction form
    118,681.65/163,778.49 = 64,965.69/x
  3. Step 3: Cross multiply
    118,681.65x = 163,778.49 × 64,965.69
  4. Step 4: Simplify right side
    118,681.65x = 10,639,982,610.01
  5. Step 5: Solve for x
    x = 10,639,982,610.01/118,681.65
  6. Step 6: Final answer
    x = 89,651.46

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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.