Home / 78,491.30-108,603.22-68,440.68

Finding the Fourth Proportional to 78,491.30, 108,603.22 and 68,440.68

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Solution

The fourth proportional to 78,491.30, 108,603.22 and 68,440.68 is: 94,696.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491.30 : 108,603.22 = 68,440.68 : x
  2. Step 2: Convert to fraction form
    78,491.30/108,603.22 = 68,440.68/x
  3. Step 3: Cross multiply
    78,491.30x = 108,603.22 × 68,440.68
  4. Step 4: Simplify right side
    78,491.30x = 7,432,878,226.99
  5. Step 5: Solve for x
    x = 7,432,878,226.99/78,491.30
  6. Step 6: Final answer
    x = 94,696.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.