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Finding the Fourth Proportional to 87,243.77, 130,837.90 and 28,065.66

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Solution

The fourth proportional to 87,243.77, 130,837.90 and 28,065.66 is: 42,089.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,243.77 : 130,837.90 = 28,065.66 : x
  2. Step 2: Convert to fraction form
    87,243.77/130,837.90 = 28,065.66/x
  3. Step 3: Cross multiply
    87,243.77x = 130,837.90 × 28,065.66
  4. Step 4: Simplify right side
    87,243.77x = 3,672,052,016.51
  5. Step 5: Solve for x
    x = 3,672,052,016.51/87,243.77
  6. Step 6: Final answer
    x = 42,089.56

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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.