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Finding the Fourth Proportional to 261,111.60, 391,703.85 and 111,350.70

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Solution

The fourth proportional to 261,111.60, 391,703.85 and 111,350.70 is: 167,041.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,111.60 : 391,703.85 = 111,350.70 : x
  2. Step 2: Convert to fraction form
    261,111.60/391,703.85 = 111,350.70/x
  3. Step 3: Cross multiply
    261,111.60x = 391,703.85 × 111,350.70
  4. Step 4: Simplify right side
    261,111.60x = 43,616,497,890.20
  5. Step 5: Solve for x
    x = 43,616,497,890.20/261,111.60
  6. Step 6: Final answer
    x = 167,041.59

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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.