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Finding the Fourth Proportional to 68,685.93, 103,043.69 and 21,300.07

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Solution

The fourth proportional to 68,685.93, 103,043.69 and 21,300.07 is: 31,954.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,685.93 : 103,043.69 = 21,300.07 : x
  2. Step 2: Convert to fraction form
    68,685.93/103,043.69 = 21,300.07/x
  3. Step 3: Cross multiply
    68,685.93x = 103,043.69 × 21,300.07
  4. Step 4: Simplify right side
    68,685.93x = 2,194,837,810.06
  5. Step 5: Solve for x
    x = 2,194,837,810.06/68,685.93
  6. Step 6: Final answer
    x = 31,954.69

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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.