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Finding the Fourth Proportional to 138,607.80, 207,911.70 and 132,702.90

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Solution

The fourth proportional to 138,607.80, 207,911.70 and 132,702.90 is: 199,054.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,607.80 : 207,911.70 = 132,702.90 : x
  2. Step 2: Convert to fraction form
    138,607.80/207,911.70 = 132,702.90/x
  3. Step 3: Cross multiply
    138,607.80x = 207,911.70 × 132,702.90
  4. Step 4: Simplify right side
    138,607.80x = 27,590,485,533.93
  5. Step 5: Solve for x
    x = 27,590,485,533.93/138,607.80
  6. Step 6: Final answer
    x = 199,054.35

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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.