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Finding the Fourth Proportional to 118,497.69, 163,530.81 and 64,781.64

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Solution

The fourth proportional to 118,497.69, 163,530.81 and 64,781.64 is: 89,400.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,497.69 : 163,530.81 = 64,781.64 : x
  2. Step 2: Convert to fraction form
    118,497.69/163,530.81 = 64,781.64/x
  3. Step 3: Cross multiply
    118,497.69x = 163,530.81 × 64,781.64
  4. Step 4: Simplify right side
    118,497.69x = 10,593,794,062.33
  5. Step 5: Solve for x
    x = 10,593,794,062.33/118,497.69
  6. Step 6: Final answer
    x = 89,400.85

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1.5x scale

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.