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Finding the Fourth Proportional to 87,310.80, 130,933.80 and 34,709.40

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Solution

The fourth proportional to 87,310.80, 130,933.80 and 34,709.40 is: 52,051.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,310.80 : 130,933.80 = 34,709.40 : x
  2. Step 2: Convert to fraction form
    87,310.80/130,933.80 = 34,709.40/x
  3. Step 3: Cross multiply
    87,310.80x = 130,933.80 × 34,709.40
  4. Step 4: Simplify right side
    87,310.80x = 4,544,633,637.72
  5. Step 5: Solve for x
    x = 4,544,633,637.72/87,310.80
  6. Step 6: Final answer
    x = 52,051.22

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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.