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Finding the Fourth Proportional to 118,681.66, 163,782.61 and 64,965.75

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Solution

The fourth proportional to 118,681.66, 163,782.61 and 64,965.75 is: 89,653.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,681.66 : 163,782.61 = 64,965.75 : x
  2. Step 2: Convert to fraction form
    118,681.66/163,782.61 = 64,965.75/x
  3. Step 3: Cross multiply
    118,681.66x = 163,782.61 × 64,965.75
  4. Step 4: Simplify right side
    118,681.66x = 10,640,259,319.01
  5. Step 5: Solve for x
    x = 10,640,259,319.01/118,681.66
  6. Step 6: Final answer
    x = 89,653.78

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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.