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Finding the Fourth Proportional to 66,243.78, 99,351.56 and 21,860.10

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Solution

The fourth proportional to 66,243.78, 99,351.56 and 21,860.10 is: 32,785.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,243.78 : 99,351.56 = 21,860.10 : x
  2. Step 2: Convert to fraction form
    66,243.78/99,351.56 = 21,860.10/x
  3. Step 3: Cross multiply
    66,243.78x = 99,351.56 × 21,860.10
  4. Step 4: Simplify right side
    66,243.78x = 2,171,835,036.76
  5. Step 5: Solve for x
    x = 2,171,835,036.76/66,243.78
  6. Step 6: Final answer
    x = 32,785.49

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1.5x scale

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.