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Finding the Fourth Proportional to 212,012.77, 292,645.79 and 135,737.29

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Solution

The fourth proportional to 212,012.77, 292,645.79 and 135,737.29 is: 187,361.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,012.77 : 292,645.79 = 135,737.29 : x
  2. Step 2: Convert to fraction form
    212,012.77/292,645.79 = 135,737.29/x
  3. Step 3: Cross multiply
    212,012.77x = 292,645.79 × 135,737.29
  4. Step 4: Simplify right side
    212,012.77x = 39,722,947,101.95
  5. Step 5: Solve for x
    x = 39,722,947,101.95/212,012.77
  6. Step 6: Final answer
    x = 187,361.11

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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.