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Finding the Fourth Proportional to 68,600.21, 102,900.31 and 45,221.18

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Solution

The fourth proportional to 68,600.21, 102,900.31 and 45,221.18 is: 67,831.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,600.21 : 102,900.31 = 45,221.18 : x
  2. Step 2: Convert to fraction form
    68,600.21/102,900.31 = 45,221.18/x
  3. Step 3: Cross multiply
    68,600.21x = 102,900.31 × 45,221.18
  4. Step 4: Simplify right side
    68,600.21x = 4,653,273,397.34
  5. Step 5: Solve for x
    x = 4,653,273,397.34/68,600.21
  6. Step 6: Final answer
    x = 67,831.77

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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.