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Finding the Fourth Proportional to 68,693.90, 102,888.61 and 52,781.81

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Solution

The fourth proportional to 68,693.90, 102,888.61 and 52,781.81 is: 79,055.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,693.90 : 102,888.61 = 52,781.81 : x
  2. Step 2: Convert to fraction form
    68,693.90/102,888.61 = 52,781.81/x
  3. Step 3: Cross multiply
    68,693.90x = 102,888.61 × 52,781.81
  4. Step 4: Simplify right side
    68,693.90x = 5,430,647,064.18
  5. Step 5: Solve for x
    x = 5,430,647,064.18/68,693.90
  6. Step 6: Final answer
    x = 79,055.74

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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.