Home / 87,871.76-131,780.36-31,704.56

Finding the Fourth Proportional to 87,871.76, 131,780.36 and 31,704.56

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Solution

The fourth proportional to 87,871.76, 131,780.36 and 31,704.56 is: 47,547.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,871.76 : 131,780.36 = 31,704.56 : x
  2. Step 2: Convert to fraction form
    87,871.76/131,780.36 = 31,704.56/x
  3. Step 3: Cross multiply
    87,871.76x = 131,780.36 × 31,704.56
  4. Step 4: Simplify right side
    87,871.76x = 4,178,038,739.15
  5. Step 5: Solve for x
    x = 4,178,038,739.15/87,871.76
  6. Step 6: Final answer
    x = 47,547.00

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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.