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Finding the Fourth Proportional to 99,943.32, 138,035.16 and 68,056.86

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Solution

The fourth proportional to 99,943.32, 138,035.16 and 68,056.86 is: 93,995.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,943.32 : 138,035.16 = 68,056.86 : x
  2. Step 2: Convert to fraction form
    99,943.32/138,035.16 = 68,056.86/x
  3. Step 3: Cross multiply
    99,943.32x = 138,035.16 × 68,056.86
  4. Step 4: Simplify right side
    99,943.32x = 9,394,239,559.20
  5. Step 5: Solve for x
    x = 9,394,239,559.20/99,943.32
  6. Step 6: Final answer
    x = 93,995.67

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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.