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Finding the Fourth Proportional to 100,376.52, 138,519.56 and 55,664.52

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Solution

The fourth proportional to 100,376.52, 138,519.56 and 55,664.52 is: 76,817.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,376.52 : 138,519.56 = 55,664.52 : x
  2. Step 2: Convert to fraction form
    100,376.52/138,519.56 = 55,664.52/x
  3. Step 3: Cross multiply
    100,376.52x = 138,519.56 × 55,664.52
  4. Step 4: Simplify right side
    100,376.52x = 7,710,624,818.01
  5. Step 5: Solve for x
    x = 7,710,624,818.01/100,376.52
  6. Step 6: Final answer
    x = 76,817.02

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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.