Home / 261,147.86-391,756.65-103,339.41

Finding the Fourth Proportional to 261,147.86, 391,756.65 and 103,339.41

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Solution

The fourth proportional to 261,147.86, 391,756.65 and 103,339.41 is: 155,022.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,147.86 : 391,756.65 = 103,339.41 : x
  2. Step 2: Convert to fraction form
    261,147.86/391,756.65 = 103,339.41/x
  3. Step 3: Cross multiply
    261,147.86x = 391,756.65 × 103,339.41
  4. Step 4: Simplify right side
    261,147.86x = 40,483,901,074.58
  5. Step 5: Solve for x
    x = 40,483,901,074.58/261,147.86
  6. Step 6: Final answer
    x = 155,022.91

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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.