Home / 66,109.63-99,171.50-21,115.27

Finding the Fourth Proportional to 66,109.63, 99,171.50 and 21,115.27

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Solution

The fourth proportional to 66,109.63, 99,171.50 and 21,115.27 is: 31,675.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,109.63 : 99,171.50 = 21,115.27 : x
  2. Step 2: Convert to fraction form
    66,109.63/99,171.50 = 21,115.27/x
  3. Step 3: Cross multiply
    66,109.63x = 99,171.50 × 21,115.27
  4. Step 4: Simplify right side
    66,109.63x = 2,094,032,998.81
  5. Step 5: Solve for x
    x = 2,094,032,998.81/66,109.63
  6. Step 6: Final answer
    x = 31,675.16

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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.