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Finding the Fourth Proportional to 81,969.57, 122,905.08 and 55,594.35

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Solution

The fourth proportional to 81,969.57, 122,905.08 and 55,594.35 is: 83,358.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,969.57 : 122,905.08 = 55,594.35 : x
  2. Step 2: Convert to fraction form
    81,969.57/122,905.08 = 55,594.35/x
  3. Step 3: Cross multiply
    81,969.57x = 122,905.08 × 55,594.35
  4. Step 4: Simplify right side
    81,969.57x = 6,832,828,034.30
  5. Step 5: Solve for x
    x = 6,832,828,034.30/81,969.57
  6. Step 6: Final answer
    x = 83,358.11

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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.