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Finding the Fourth Proportional to 125,553, 188,380.74 and 66,372.84

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Solution

The fourth proportional to 125,553, 188,380.74 and 66,372.84 is: 99,586.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,553 : 188,380.74 = 66,372.84 : x
  2. Step 2: Convert to fraction form
    125,553/188,380.74 = 66,372.84/x
  3. Step 3: Cross multiply
    125,553x = 188,380.74 × 66,372.84
  4. Step 4: Simplify right side
    125,553x = 12,503,364,715.10
  5. Step 5: Solve for x
    x = 12,503,364,715.10/125,553
  6. Step 6: Final answer
    x = 99,586.35

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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.