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Finding the Fourth Proportional to 255,700.21, 383,550 and 68,711.71

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Solution

The fourth proportional to 255,700.21, 383,550 and 68,711.71 is: 103,067.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,700.21 : 383,550 = 68,711.71 : x
  2. Step 2: Convert to fraction form
    255,700.21/383,550 = 68,711.71/x
  3. Step 3: Cross multiply
    255,700.21x = 383,550 × 68,711.71
  4. Step 4: Simplify right side
    255,700.21x = 26,354,376,370.50
  5. Step 5: Solve for x
    x = 26,354,376,370.50/255,700.21
  6. Step 6: Final answer
    x = 103,067.48

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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.