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Finding the Fourth Proportional to 68,339.81, 102,517 and 28,900.91

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Solution

The fourth proportional to 68,339.81, 102,517 and 28,900.91 is: 43,354.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,339.81 : 102,517 = 28,900.91 : x
  2. Step 2: Convert to fraction form
    68,339.81/102,517 = 28,900.91/x
  3. Step 3: Cross multiply
    68,339.81x = 102,517 × 28,900.91
  4. Step 4: Simplify right side
    68,339.81x = 2,962,834,077.89
  5. Step 5: Solve for x
    x = 2,962,834,077.89/68,339.81
  6. Step 6: Final answer
    x = 43,354.44

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1.5x scale

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.