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Finding the Fourth Proportional to 261,192.20, 391,917.90 and 103,425.80

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Solution

The fourth proportional to 261,192.20, 391,917.90 and 103,425.80 is: 155,190.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,192.20 : 391,917.90 = 103,425.80 : x
  2. Step 2: Convert to fraction form
    261,192.20/391,917.90 = 103,425.80/x
  3. Step 3: Cross multiply
    261,192.20x = 391,917.90 × 103,425.80
  4. Step 4: Simplify right side
    261,192.20x = 40,534,422,341.82
  5. Step 5: Solve for x
    x = 40,534,422,341.82/261,192.20
  6. Step 6: Final answer
    x = 155,190.02

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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.