Home / 138,420.11-207,531.74-66,290.42

Finding the Fourth Proportional to 138,420.11, 207,531.74 and 66,290.42

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Solution

The fourth proportional to 138,420.11, 207,531.74 and 66,290.42 is: 99,388.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,420.11 : 207,531.74 = 66,290.42 : x
  2. Step 2: Convert to fraction form
    138,420.11/207,531.74 = 66,290.42/x
  3. Step 3: Cross multiply
    138,420.11x = 207,531.74 × 66,290.42
  4. Step 4: Simplify right side
    138,420.11x = 13,757,364,838.82
  5. Step 5: Solve for x
    x = 13,757,364,838.82/138,420.11
  6. Step 6: Final answer
    x = 99,388.49

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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.