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Finding the Fourth Proportional to 84,685.93, 126,918.15 and 34,707.51

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Solution

The fourth proportional to 84,685.93, 126,918.15 and 34,707.51 is: 52,015.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,685.93 : 126,918.15 = 34,707.51 : x
  2. Step 2: Convert to fraction form
    84,685.93/126,918.15 = 34,707.51/x
  3. Step 3: Cross multiply
    84,685.93x = 126,918.15 × 34,707.51
  4. Step 4: Simplify right side
    84,685.93x = 4,405,012,960.31
  5. Step 5: Solve for x
    x = 4,405,012,960.31/84,685.93
  6. Step 6: Final answer
    x = 52,015.88

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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.