Home / 139,979.88-209,987.64-51,275.16

Finding the Fourth Proportional to 139,979.88, 209,987.64 and 51,275.16

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Solution

The fourth proportional to 139,979.88, 209,987.64 and 51,275.16 is: 76,919.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,979.88 : 209,987.64 = 51,275.16 : x
  2. Step 2: Convert to fraction form
    139,979.88/209,987.64 = 51,275.16/x
  3. Step 3: Cross multiply
    139,979.88x = 209,987.64 × 51,275.16
  4. Step 4: Simplify right side
    139,979.88x = 10,767,149,839.02
  5. Step 5: Solve for x
    x = 10,767,149,839.02/139,979.88
  6. Step 6: Final answer
    x = 76,919.27

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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.