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Finding the Fourth Proportional to 103,930.21, 143,328.04 and 68,107.21

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Solution

The fourth proportional to 103,930.21, 143,328.04 and 68,107.21 is: 93,925.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,930.21 : 143,328.04 = 68,107.21 : x
  2. Step 2: Convert to fraction form
    103,930.21/143,328.04 = 68,107.21/x
  3. Step 3: Cross multiply
    103,930.21x = 143,328.04 × 68,107.21
  4. Step 4: Simplify right side
    103,930.21x = 9,761,672,919.17
  5. Step 5: Solve for x
    x = 9,761,672,919.17/103,930.21
  6. Step 6: Final answer
    x = 93,925.27

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1.5x scale

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.