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Finding the Fourth Proportional to 78,553.43, 117,812.38 and 22,392.34

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Solution

The fourth proportional to 78,553.43, 117,812.38 and 22,392.34 is: 33,583.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,553.43 : 117,812.38 = 22,392.34 : x
  2. Step 2: Convert to fraction form
    78,553.43/117,812.38 = 22,392.34/x
  3. Step 3: Cross multiply
    78,553.43x = 117,812.38 × 22,392.34
  4. Step 4: Simplify right side
    78,553.43x = 2,638,094,869.17
  5. Step 5: Solve for x
    x = 2,638,094,869.17/78,553.43
  6. Step 6: Final answer
    x = 33,583.45

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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.