Home / 66,145.09-99,231.31-21,774.51

Finding the Fourth Proportional to 66,145.09, 99,231.31 and 21,774.51

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Solution

The fourth proportional to 66,145.09, 99,231.31 and 21,774.51 is: 32,666.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,145.09 : 99,231.31 = 21,774.51 : x
  2. Step 2: Convert to fraction form
    66,145.09/99,231.31 = 21,774.51/x
  3. Step 3: Cross multiply
    66,145.09x = 99,231.31 × 21,774.51
  4. Step 4: Simplify right side
    66,145.09x = 2,160,712,546.88
  5. Step 5: Solve for x
    x = 2,160,712,546.88/66,145.09
  6. Step 6: Final answer
    x = 32,666.26

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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.