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Finding the Fourth Proportional to 261,187.56, 391,551.60 and 103,526.68

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Solution

The fourth proportional to 261,187.56, 391,551.60 and 103,526.68 is: 155,198.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,187.56 : 391,551.60 = 103,526.68 : x
  2. Step 2: Convert to fraction form
    261,187.56/391,551.60 = 103,526.68/x
  3. Step 3: Cross multiply
    261,187.56x = 391,551.60 × 103,526.68
  4. Step 4: Simplify right side
    261,187.56x = 40,536,037,196.69
  5. Step 5: Solve for x
    x = 40,536,037,196.69/261,187.56
  6. Step 6: Final answer
    x = 155,198.96

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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.