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Finding the Fourth Proportional to 78,551.43, 117,809.39 and 22,390.34

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Solution

The fourth proportional to 78,551.43, 117,809.39 and 22,390.34 is: 33,580.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,551.43 : 117,809.39 = 22,390.34 : x
  2. Step 2: Convert to fraction form
    78,551.43/117,809.39 = 22,390.34/x
  3. Step 3: Cross multiply
    78,551.43x = 117,809.39 × 22,390.34
  4. Step 4: Simplify right side
    78,551.43x = 2,637,791,596.29
  5. Step 5: Solve for x
    x = 2,637,791,596.29/78,551.43
  6. Step 6: Final answer
    x = 33,580.44

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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.