Home / 261,971.28-393,129-143,725.68

Finding the Fourth Proportional to 261,971.28, 393,129 and 143,725.68

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Solution

The fourth proportional to 261,971.28, 393,129 and 143,725.68 is: 215,682.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,971.28 : 393,129 = 143,725.68 : x
  2. Step 2: Convert to fraction form
    261,971.28/393,129 = 143,725.68/x
  3. Step 3: Cross multiply
    261,971.28x = 393,129 × 143,725.68
  4. Step 4: Simplify right side
    261,971.28x = 56,502,732,852.72
  5. Step 5: Solve for x
    x = 56,502,732,852.72/261,971.28
  6. Step 6: Final answer
    x = 215,682.93

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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.