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Finding the Fourth Proportional to 100,908.52, 139,253.72 and 58,491.64

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Solution

The fourth proportional to 100,908.52, 139,253.72 and 58,491.64 is: 80,718.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,908.52 : 139,253.72 = 58,491.64 : x
  2. Step 2: Convert to fraction form
    100,908.52/139,253.72 = 58,491.64/x
  3. Step 3: Cross multiply
    100,908.52x = 139,253.72 × 58,491.64
  4. Step 4: Simplify right side
    100,908.52x = 8,145,178,458.90
  5. Step 5: Solve for x
    x = 8,145,178,458.90/100,908.52
  6. Step 6: Final answer
    x = 80,718.44

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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.