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Finding the Fourth Proportional to 112,708.82, 168,823.46 and 91,549.46

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Solution

The fourth proportional to 112,708.82, 168,823.46 and 91,549.46 is: 137,129.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,708.82 : 168,823.46 = 91,549.46 : x
  2. Step 2: Convert to fraction form
    112,708.82/168,823.46 = 91,549.46/x
  3. Step 3: Cross multiply
    112,708.82x = 168,823.46 × 91,549.46
  4. Step 4: Simplify right side
    112,708.82x = 15,455,696,598.33
  5. Step 5: Solve for x
    x = 15,455,696,598.33/112,708.82
  6. Step 6: Final answer
    x = 137,129.43

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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.