Home / 103,715.88-155,442.60-66,261.48

Finding the Fourth Proportional to 103,715.88, 155,442.60 and 66,261.48

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Solution

The fourth proportional to 103,715.88, 155,442.60 and 66,261.48 is: 99,308.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,715.88 : 155,442.60 = 66,261.48 : x
  2. Step 2: Convert to fraction form
    103,715.88/155,442.60 = 66,261.48/x
  3. Step 3: Cross multiply
    103,715.88x = 155,442.60 × 66,261.48
  4. Step 4: Simplify right side
    103,715.88x = 10,299,856,731.05
  5. Step 5: Solve for x
    x = 10,299,856,731.05/103,715.88
  6. Step 6: Final answer
    x = 99,308.39

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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.