Home / 87,543.80-131,315.70-77,406.20

Finding the Fourth Proportional to 87,543.80, 131,315.70 and 77,406.20

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Solution

The fourth proportional to 87,543.80, 131,315.70 and 77,406.20 is: 116,109.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,543.80 : 131,315.70 = 77,406.20 : x
  2. Step 2: Convert to fraction form
    87,543.80/131,315.70 = 77,406.20/x
  3. Step 3: Cross multiply
    87,543.80x = 131,315.70 × 77,406.20
  4. Step 4: Simplify right side
    87,543.80x = 10,164,649,337.34
  5. Step 5: Solve for x
    x = 10,164,649,337.34/87,543.80
  6. Step 6: Final answer
    x = 116,109.30

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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.