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Finding the Fourth Proportional to 68,646, 102,512.10 and 67,903.74

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Solution

The fourth proportional to 68,646, 102,512.10 and 67,903.74 is: 101,403.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,646 : 102,512.10 = 67,903.74 : x
  2. Step 2: Convert to fraction form
    68,646/102,512.10 = 67,903.74/x
  3. Step 3: Cross multiply
    68,646x = 102,512.10 × 67,903.74
  4. Step 4: Simplify right side
    68,646x = 6,960,954,985.25
  5. Step 5: Solve for x
    x = 6,960,954,985.25/68,646
  6. Step 6: Final answer
    x = 101,403.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.