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Finding the Fourth Proportional to 101,052.91, 139,449.75 and 55,732.81

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Solution

The fourth proportional to 101,052.91, 139,449.75 and 55,732.81 is: 76,909.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,052.91 : 139,449.75 = 55,732.81 : x
  2. Step 2: Convert to fraction form
    101,052.91/139,449.75 = 55,732.81/x
  3. Step 3: Cross multiply
    101,052.91x = 139,449.75 × 55,732.81
  4. Step 4: Simplify right side
    101,052.91x = 7,771,926,421.30
  5. Step 5: Solve for x
    x = 7,771,926,421.30/101,052.91
  6. Step 6: Final answer
    x = 76,909.48

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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.