Home / 115,814.30-173,721.45-81,988.70

Finding the Fourth Proportional to 115,814.30, 173,721.45 and 81,988.70

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Solution

The fourth proportional to 115,814.30, 173,721.45 and 81,988.70 is: 122,983.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,814.30 : 173,721.45 = 81,988.70 : x
  2. Step 2: Convert to fraction form
    115,814.30/173,721.45 = 81,988.70/x
  3. Step 3: Cross multiply
    115,814.30x = 173,721.45 × 81,988.70
  4. Step 4: Simplify right side
    115,814.30x = 14,243,195,847.62
  5. Step 5: Solve for x
    x = 14,243,195,847.62/115,814.30
  6. Step 6: Final answer
    x = 122,983.05

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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.