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Finding the Fourth Proportional to 118,399.71, 163,363.98 and 73,079.60

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Solution

The fourth proportional to 118,399.71, 163,363.98 and 73,079.60 is: 100,832.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,399.71 : 163,363.98 = 73,079.60 : x
  2. Step 2: Convert to fraction form
    118,399.71/163,363.98 = 73,079.60/x
  3. Step 3: Cross multiply
    118,399.71x = 163,363.98 × 73,079.60
  4. Step 4: Simplify right side
    118,399.71x = 11,938,573,495.99
  5. Step 5: Solve for x
    x = 11,938,573,495.99/118,399.71
  6. Step 6: Final answer
    x = 100,832.79

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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.