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Finding the Fourth Proportional to 138,852.47, 208,138.48 and 54,671.72

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Solution

The fourth proportional to 138,852.47, 208,138.48 and 54,671.72 is: 81,952.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,852.47 : 208,138.48 = 54,671.72 : x
  2. Step 2: Convert to fraction form
    138,852.47/208,138.48 = 54,671.72/x
  3. Step 3: Cross multiply
    138,852.47x = 208,138.48 × 54,671.72
  4. Step 4: Simplify right side
    138,852.47x = 11,379,287,522.41
  5. Step 5: Solve for x
    x = 11,379,287,522.41/138,852.47
  6. Step 6: Final answer
    x = 81,952.36

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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.