Home / 66,387.18-99,575.31-21,999.42

Finding the Fourth Proportional to 66,387.18, 99,575.31 and 21,999.42

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Solution

The fourth proportional to 66,387.18, 99,575.31 and 21,999.42 is: 32,997.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,387.18 : 99,575.31 = 21,999.42 : x
  2. Step 2: Convert to fraction form
    66,387.18/99,575.31 = 21,999.42/x
  3. Step 3: Cross multiply
    66,387.18x = 99,575.31 × 21,999.42
  4. Step 4: Simplify right side
    66,387.18x = 2,190,599,066.32
  5. Step 5: Solve for x
    x = 2,190,599,066.32/66,387.18
  6. Step 6: Final answer
    x = 32,997.32

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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.