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Finding the Fourth Proportional to 68,863.70, 103,098.45 and 42,390.20

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Solution

The fourth proportional to 68,863.70, 103,098.45 and 42,390.20 is: 63,463.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,863.70 : 103,098.45 = 42,390.20 : x
  2. Step 2: Convert to fraction form
    68,863.70/103,098.45 = 42,390.20/x
  3. Step 3: Cross multiply
    68,863.70x = 103,098.45 × 42,390.20
  4. Step 4: Simplify right side
    68,863.70x = 4,370,363,915.19
  5. Step 5: Solve for x
    x = 4,370,363,915.19/68,863.70
  6. Step 6: Final answer
    x = 63,463.97

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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.