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Finding the Fourth Proportional to 123,690.93, 170,693.51 and 69,974.84

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Solution

The fourth proportional to 123,690.93, 170,693.51 and 69,974.84 is: 96,565.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,690.93 : 170,693.51 = 69,974.84 : x
  2. Step 2: Convert to fraction form
    123,690.93/170,693.51 = 69,974.84/x
  3. Step 3: Cross multiply
    123,690.93x = 170,693.51 × 69,974.84
  4. Step 4: Simplify right side
    123,690.93x = 11,944,249,847.95
  5. Step 5: Solve for x
    x = 11,944,249,847.95/123,690.93
  6. Step 6: Final answer
    x = 96,565.28

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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.