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Finding the Fourth Proportional to 118,236.80, 163,170.25 and 64,525.28

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Solution

The fourth proportional to 118,236.80, 163,170.25 and 64,525.28 is: 89,046.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,236.80 : 163,170.25 = 64,525.28 : x
  2. Step 2: Convert to fraction form
    118,236.80/163,170.25 = 64,525.28/x
  3. Step 3: Cross multiply
    118,236.80x = 163,170.25 × 64,525.28
  4. Step 4: Simplify right side
    118,236.80x = 10,528,606,068.92
  5. Step 5: Solve for x
    x = 10,528,606,068.92/118,236.80
  6. Step 6: Final answer
    x = 89,046.78

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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.