Home / 123,479.90-185,313.55-81,345.60

Finding the Fourth Proportional to 123,479.90, 185,313.55 and 81,345.60

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Solution

The fourth proportional to 123,479.90, 185,313.55 and 81,345.60 is: 122,080.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,479.90 : 185,313.55 = 81,345.60 : x
  2. Step 2: Convert to fraction form
    123,479.90/185,313.55 = 81,345.60/x
  3. Step 3: Cross multiply
    123,479.90x = 185,313.55 × 81,345.60
  4. Step 4: Simplify right side
    123,479.90x = 15,074,441,912.88
  5. Step 5: Solve for x
    x = 15,074,441,912.88/123,479.90
  6. Step 6: Final answer
    x = 122,080.13

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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.