Home / 261,121.67-391,660.64-103,307.75

Finding the Fourth Proportional to 261,121.67, 391,660.64 and 103,307.75

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Solution

The fourth proportional to 261,121.67, 391,660.64 and 103,307.75 is: 154,952.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,121.67 : 391,660.64 = 103,307.75 : x
  2. Step 2: Convert to fraction form
    261,121.67/391,660.64 = 103,307.75/x
  3. Step 3: Cross multiply
    261,121.67x = 391,660.64 × 103,307.75
  4. Step 4: Simplify right side
    261,121.67x = 40,461,578,965.42
  5. Step 5: Solve for x
    x = 40,461,578,965.42/261,121.67
  6. Step 6: Final answer
    x = 154,952.97

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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.