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Finding the Fourth Proportional to 68,686.93, 103,045.19 and 21,301.07

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Solution

The fourth proportional to 68,686.93, 103,045.19 and 21,301.07 is: 31,956.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,686.93 : 103,045.19 = 21,301.07 : x
  2. Step 2: Convert to fraction form
    68,686.93/103,045.19 = 21,301.07/x
  3. Step 3: Cross multiply
    68,686.93x = 103,045.19 × 21,301.07
  4. Step 4: Simplify right side
    68,686.93x = 2,194,972,698.85
  5. Step 5: Solve for x
    x = 2,194,972,698.85/68,686.93
  6. Step 6: Final answer
    x = 31,956.19

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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.