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Finding the Fourth Proportional to 68,377, 102,568.62 and 20,988.64

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Solution

The fourth proportional to 68,377, 102,568.62 and 20,988.64 is: 31,483.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,377 : 102,568.62 = 20,988.64 : x
  2. Step 2: Convert to fraction form
    68,377/102,568.62 = 20,988.64/x
  3. Step 3: Cross multiply
    68,377x = 102,568.62 × 20,988.64
  4. Step 4: Simplify right side
    68,377x = 2,152,775,840.48
  5. Step 5: Solve for x
    x = 2,152,775,840.48/68,377
  6. Step 6: Final answer
    x = 31,483.92

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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.