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Finding the Fourth Proportional to 81,070.60, 121,606.31 and 36,645.34

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Solution

The fourth proportional to 81,070.60, 121,606.31 and 36,645.34 is: 54,968.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,070.60 : 121,606.31 = 36,645.34 : x
  2. Step 2: Convert to fraction form
    81,070.60/121,606.31 = 36,645.34/x
  3. Step 3: Cross multiply
    81,070.60x = 121,606.31 × 36,645.34
  4. Step 4: Simplify right side
    81,070.60x = 4,456,304,392.87
  5. Step 5: Solve for x
    x = 4,456,304,392.87/81,070.60
  6. Step 6: Final answer
    x = 54,968.19

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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.