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Finding the Fourth Proportional to 138,709.44, 208,072.80 and 55,592.64

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Solution

The fourth proportional to 138,709.44, 208,072.80 and 55,592.64 is: 83,392.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,709.44 : 208,072.80 = 55,592.64 : x
  2. Step 2: Convert to fraction form
    138,709.44/208,072.80 = 55,592.64/x
  3. Step 3: Cross multiply
    138,709.44x = 208,072.80 × 55,592.64
  4. Step 4: Simplify right side
    138,709.44x = 11,567,316,264.19
  5. Step 5: Solve for x
    x = 11,567,316,264.19/138,709.44
  6. Step 6: Final answer
    x = 83,392.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.