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Finding the Fourth Proportional to 86,875.80, 130,067.97 and 55,207.37

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Solution

The fourth proportional to 86,875.80, 130,067.97 and 55,207.37 is: 82,654.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,875.80 : 130,067.97 = 55,207.37 : x
  2. Step 2: Convert to fraction form
    86,875.80/130,067.97 = 55,207.37/x
  3. Step 3: Cross multiply
    86,875.80x = 130,067.97 × 55,207.37
  4. Step 4: Simplify right side
    86,875.80x = 7,180,710,544.94
  5. Step 5: Solve for x
    x = 7,180,710,544.94/86,875.80
  6. Step 6: Final answer
    x = 82,654.90

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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.