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Finding the Fourth Proportional to 68,602.10, 94,675.29 and 38,390.90

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Solution

The fourth proportional to 68,602.10, 94,675.29 and 38,390.90 is: 52,981.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,602.10 : 94,675.29 = 38,390.90 : x
  2. Step 2: Convert to fraction form
    68,602.10/94,675.29 = 38,390.90/x
  3. Step 3: Cross multiply
    68,602.10x = 94,675.29 × 38,390.90
  4. Step 4: Simplify right side
    68,602.10x = 3,634,669,590.86
  5. Step 5: Solve for x
    x = 3,634,669,590.86/68,602.10
  6. Step 6: Final answer
    x = 52,981.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.