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Finding the Fourth Proportional to 100,727.52, 139,007.40 and 55,408.88

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Solution

The fourth proportional to 100,727.52, 139,007.40 and 55,408.88 is: 76,466.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,727.52 : 139,007.40 = 55,408.88 : x
  2. Step 2: Convert to fraction form
    100,727.52/139,007.40 = 55,408.88/x
  3. Step 3: Cross multiply
    100,727.52x = 139,007.40 × 55,408.88
  4. Step 4: Simplify right side
    100,727.52x = 7,702,244,345.71
  5. Step 5: Solve for x
    x = 7,702,244,345.71/100,727.52
  6. Step 6: Final answer
    x = 76,466.14

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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.