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Finding the Fourth Proportional to 66,419.52, 99,579.04 and 40,118.08

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Solution

The fourth proportional to 66,419.52, 99,579.04 and 40,118.08 is: 60,146.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,419.52 : 99,579.04 = 40,118.08 : x
  2. Step 2: Convert to fraction form
    66,419.52/99,579.04 = 40,118.08/x
  3. Step 3: Cross multiply
    66,419.52x = 99,579.04 × 40,118.08
  4. Step 4: Simplify right side
    66,419.52x = 3,994,919,893.04
  5. Step 5: Solve for x
    x = 3,994,919,893.04/66,419.52
  6. Step 6: Final answer
    x = 60,146.77

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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.