Home / 143,358.88-214,971.12-76,786.72

Finding the Fourth Proportional to 143,358.88, 214,971.12 and 76,786.72

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Solution

The fourth proportional to 143,358.88, 214,971.12 and 76,786.72 is: 115,144.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,358.88 : 214,971.12 = 76,786.72 : x
  2. Step 2: Convert to fraction form
    143,358.88/214,971.12 = 76,786.72/x
  3. Step 3: Cross multiply
    143,358.88x = 214,971.12 × 76,786.72
  4. Step 4: Simplify right side
    143,358.88x = 16,506,927,199.53
  5. Step 5: Solve for x
    x = 16,506,927,199.53/143,358.88
  6. Step 6: Final answer
    x = 115,144.09

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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.