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Finding the Fourth Proportional to 123,398.18, 170,289.54 and 66,809.54

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Solution

The fourth proportional to 123,398.18, 170,289.54 and 66,809.54 is: 92,197.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,398.18 : 170,289.54 = 66,809.54 : x
  2. Step 2: Convert to fraction form
    123,398.18/170,289.54 = 66,809.54/x
  3. Step 3: Cross multiply
    123,398.18x = 170,289.54 × 66,809.54
  4. Step 4: Simplify right side
    123,398.18x = 11,376,965,834.21
  5. Step 5: Solve for x
    x = 11,376,965,834.21/123,398.18
  6. Step 6: Final answer
    x = 92,197.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.