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Finding the Fourth Proportional to 68,990.92, 95,190.60 and 42,123.64

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Solution

The fourth proportional to 68,990.92, 95,190.60 and 42,123.64 is: 58,120.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,990.92 : 95,190.60 = 42,123.64 : x
  2. Step 2: Convert to fraction form
    68,990.92/95,190.60 = 42,123.64/x
  3. Step 3: Cross multiply
    68,990.92x = 95,190.60 × 42,123.64
  4. Step 4: Simplify right side
    68,990.92x = 4,009,774,565.78
  5. Step 5: Solve for x
    x = 4,009,774,565.78/68,990.92
  6. Step 6: Final answer
    x = 58,120.32

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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.