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Finding the Fourth Proportional to 118,356.78, 163,331.48 and 64,641.82

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Solution

The fourth proportional to 118,356.78, 163,331.48 and 64,641.82 is: 89,205.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,356.78 : 163,331.48 = 64,641.82 : x
  2. Step 2: Convert to fraction form
    118,356.78/163,331.48 = 64,641.82/x
  3. Step 3: Cross multiply
    118,356.78x = 163,331.48 × 64,641.82
  4. Step 4: Simplify right side
    118,356.78x = 10,558,044,130.49
  5. Step 5: Solve for x
    x = 10,558,044,130.49/118,356.78
  6. Step 6: Final answer
    x = 89,205.23

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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.