Home / 123,719.92-185,489-39,431.60

Finding the Fourth Proportional to 123,719.92, 185,489 and 39,431.60

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Solution

The fourth proportional to 123,719.92, 185,489 and 39,431.60 is: 59,118.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,719.92 : 185,489 = 39,431.60 : x
  2. Step 2: Convert to fraction form
    123,719.92/185,489 = 39,431.60/x
  3. Step 3: Cross multiply
    123,719.92x = 185,489 × 39,431.60
  4. Step 4: Simplify right side
    123,719.92x = 7,314,128,052.40
  5. Step 5: Solve for x
    x = 7,314,128,052.40/123,719.92
  6. Step 6: Final answer
    x = 59,118.44

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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.