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Finding the Fourth Proportional to 133,108.87, 183,689.32 and 72,679.48

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Solution

The fourth proportional to 133,108.87, 183,689.32 and 72,679.48 is: 100,297.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,108.87 : 183,689.32 = 72,679.48 : x
  2. Step 2: Convert to fraction form
    133,108.87/183,689.32 = 72,679.48/x
  3. Step 3: Cross multiply
    133,108.87x = 183,689.32 × 72,679.48
  4. Step 4: Simplify right side
    133,108.87x = 13,350,443,754.51
  5. Step 5: Solve for x
    x = 13,350,443,754.51/133,108.87
  6. Step 6: Final answer
    x = 100,297.18

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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.