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Finding the Fourth Proportional to 138,051.60, 207,077.40 and 131,490.60

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Solution

The fourth proportional to 138,051.60, 207,077.40 and 131,490.60 is: 197,235.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,051.60 : 207,077.40 = 131,490.60 : x
  2. Step 2: Convert to fraction form
    138,051.60/207,077.40 = 131,490.60/x
  3. Step 3: Cross multiply
    138,051.60x = 207,077.40 × 131,490.60
  4. Step 4: Simplify right side
    138,051.60x = 27,228,731,572.44
  5. Step 5: Solve for x
    x = 27,228,731,572.44/138,051.60
  6. Step 6: Final answer
    x = 197,235.90

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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.