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Finding the Fourth Proportional to 100,835.28, 139,094.28 and 63,043.92

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Solution

The fourth proportional to 100,835.28, 139,094.28 and 63,043.92 is: 86,964.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,835.28 : 139,094.28 = 63,043.92 : x
  2. Step 2: Convert to fraction form
    100,835.28/139,094.28 = 63,043.92/x
  3. Step 3: Cross multiply
    100,835.28x = 139,094.28 × 63,043.92
  4. Step 4: Simplify right side
    100,835.28x = 8,769,048,660.78
  5. Step 5: Solve for x
    x = 8,769,048,660.78/100,835.28
  6. Step 6: Final answer
    x = 86,964.09

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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.