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Finding the Fourth Proportional to 92,630.86, 138,949.12 and 64,139.92

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Solution

The fourth proportional to 92,630.86, 138,949.12 and 64,139.92 is: 96,211.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,630.86 : 138,949.12 = 64,139.92 : x
  2. Step 2: Convert to fraction form
    92,630.86/138,949.12 = 64,139.92/x
  3. Step 3: Cross multiply
    92,630.86x = 138,949.12 × 64,139.92
  4. Step 4: Simplify right side
    92,630.86x = 8,912,185,173.67
  5. Step 5: Solve for x
    x = 8,912,185,173.67/92,630.86
  6. Step 6: Final answer
    x = 96,211.84

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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.