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Finding the Fourth Proportional to 261,173.54, 391,530.60 and 103,512.68

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Solution

The fourth proportional to 261,173.54, 391,530.60 and 103,512.68 is: 155,177.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,173.54 : 391,530.60 = 103,512.68 : x
  2. Step 2: Convert to fraction form
    261,173.54/391,530.60 = 103,512.68/x
  3. Step 3: Cross multiply
    261,173.54x = 391,530.60 × 103,512.68
  4. Step 4: Simplify right side
    261,173.54x = 40,528,381,708.01
  5. Step 5: Solve for x
    x = 40,528,381,708.01/261,173.54
  6. Step 6: Final answer
    x = 155,177.98

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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.