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Finding the Fourth Proportional to 87,108.96, 130,637.52 and 31,692

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Solution

The fourth proportional to 87,108.96, 130,637.52 and 31,692 is: 47,528.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,108.96 : 130,637.52 = 31,692 : x
  2. Step 2: Convert to fraction form
    87,108.96/130,637.52 = 31,692/x
  3. Step 3: Cross multiply
    87,108.96x = 130,637.52 × 31,692
  4. Step 4: Simplify right side
    87,108.96x = 4,140,164,283.84
  5. Step 5: Solve for x
    x = 4,140,164,283.84/87,108.96
  6. Step 6: Final answer
    x = 47,528.57

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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.