Home / 261,206.81-391,810.64-71,669.78

Finding the Fourth Proportional to 261,206.81, 391,810.64 and 71,669.78

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Solution

The fourth proportional to 261,206.81, 391,810.64 and 71,669.78 is: 107,504.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,206.81 : 391,810.64 = 71,669.78 : x
  2. Step 2: Convert to fraction form
    261,206.81/391,810.64 = 71,669.78/x
  3. Step 3: Cross multiply
    261,206.81x = 391,810.64 × 71,669.78
  4. Step 4: Simplify right side
    261,206.81x = 28,080,981,522.35
  5. Step 5: Solve for x
    x = 28,080,981,522.35/261,206.81
  6. Step 6: Final answer
    x = 107,504.78

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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.