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Finding the Fourth Proportional to 78,598.92, 117,920.25 and 43,563.18

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Solution

The fourth proportional to 78,598.92, 117,920.25 and 43,563.18 is: 65,356.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,598.92 : 117,920.25 = 43,563.18 : x
  2. Step 2: Convert to fraction form
    78,598.92/117,920.25 = 43,563.18/x
  3. Step 3: Cross multiply
    78,598.92x = 117,920.25 × 43,563.18
  4. Step 4: Simplify right side
    78,598.92x = 5,136,981,076.40
  5. Step 5: Solve for x
    x = 5,136,981,076.40/78,598.92
  6. Step 6: Final answer
    x = 65,356.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.