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Finding the Fourth Proportional to 118,489.66, 163,515.36 and 64,774.72

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Solution

The fourth proportional to 118,489.66, 163,515.36 and 64,774.72 is: 89,388.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,489.66 : 163,515.36 = 64,774.72 : x
  2. Step 2: Convert to fraction form
    118,489.66/163,515.36 = 64,774.72/x
  3. Step 3: Cross multiply
    118,489.66x = 163,515.36 × 64,774.72
  4. Step 4: Simplify right side
    118,489.66x = 10,591,661,659.70
  5. Step 5: Solve for x
    x = 10,591,661,659.70/118,489.66
  6. Step 6: Final answer
    x = 89,388.91

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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.