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Finding the Fourth Proportional to 261,208.80, 391,960.84 and 111,434.92

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Solution

The fourth proportional to 261,208.80, 391,960.84 and 111,434.92 is: 167,215.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,208.80 : 391,960.84 = 111,434.92 : x
  2. Step 2: Convert to fraction form
    261,208.80/391,960.84 = 111,434.92/x
  3. Step 3: Cross multiply
    261,208.80x = 391,960.84 × 111,434.92
  4. Step 4: Simplify right side
    261,208.80x = 43,678,124,848.53
  5. Step 5: Solve for x
    x = 43,678,124,848.53/261,208.80
  6. Step 6: Final answer
    x = 167,215.37

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1.5x scale

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.