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Finding the Fourth Proportional to 92,908.89, 139,342.32 and 42,961.64

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Solution

The fourth proportional to 92,908.89, 139,342.32 and 42,961.64 is: 64,432.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,908.89 : 139,342.32 = 42,961.64 : x
  2. Step 2: Convert to fraction form
    92,908.89/139,342.32 = 42,961.64/x
  3. Step 3: Cross multiply
    92,908.89x = 139,342.32 × 42,961.64
  4. Step 4: Simplify right side
    92,908.89x = 5,986,373,891.89
  5. Step 5: Solve for x
    x = 5,986,373,891.89/92,908.89
  6. Step 6: Final answer
    x = 64,432.74

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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.