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Finding the Fourth Proportional to 66,486.30, 99,729.45 and 61,043.10

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Solution

The fourth proportional to 66,486.30, 99,729.45 and 61,043.10 is: 91,564.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,486.30 : 99,729.45 = 61,043.10 : x
  2. Step 2: Convert to fraction form
    66,486.30/99,729.45 = 61,043.10/x
  3. Step 3: Cross multiply
    66,486.30x = 99,729.45 × 61,043.10
  4. Step 4: Simplify right side
    66,486.30x = 6,087,794,789.30
  5. Step 5: Solve for x
    x = 6,087,794,789.30/66,486.30
  6. Step 6: Final answer
    x = 91,564.65

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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.