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Finding the Fourth Proportional to 71,071.53, 106,033.74 and 68,487.21

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Solution

The fourth proportional to 71,071.53, 106,033.74 and 68,487.21 is: 102,178.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,071.53 : 106,033.74 = 68,487.21 : x
  2. Step 2: Convert to fraction form
    71,071.53/106,033.74 = 68,487.21/x
  3. Step 3: Cross multiply
    71,071.53x = 106,033.74 × 68,487.21
  4. Step 4: Simplify right side
    71,071.53x = 7,261,955,018.47
  5. Step 5: Solve for x
    x = 7,261,955,018.47/71,071.53
  6. Step 6: Final answer
    x = 102,178.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.