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Finding the Fourth Proportional to 118,434.26, 163,441.41 and 64,721.54

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Solution

The fourth proportional to 118,434.26, 163,441.41 and 64,721.54 is: 89,316.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,434.26 : 163,441.41 = 64,721.54 : x
  2. Step 2: Convert to fraction form
    118,434.26/163,441.41 = 64,721.54/x
  3. Step 3: Cross multiply
    118,434.26x = 163,441.41 × 64,721.54
  4. Step 4: Simplify right side
    118,434.26x = 10,578,179,754.97
  5. Step 5: Solve for x
    x = 10,578,179,754.97/118,434.26
  6. Step 6: Final answer
    x = 89,316.89

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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.