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Finding the Fourth Proportional to 66,346, 91,560.44 and 39,123.18

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Solution

The fourth proportional to 66,346, 91,560.44 and 39,123.18 is: 53,991.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,346 : 91,560.44 = 39,123.18 : x
  2. Step 2: Convert to fraction form
    66,346/91,560.44 = 39,123.18/x
  3. Step 3: Cross multiply
    66,346x = 91,560.44 × 39,123.18
  4. Step 4: Simplify right side
    66,346x = 3,582,135,575.00
  5. Step 5: Solve for x
    x = 3,582,135,575.00/66,346
  6. Step 6: Final answer
    x = 53,991.73

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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.