Home / 217,385.32-299,987.94-121,891.72

Finding the Fourth Proportional to 217,385.32, 299,987.94 and 121,891.72

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Solution

The fourth proportional to 217,385.32, 299,987.94 and 121,891.72 is: 168,208.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,385.32 : 299,987.94 = 121,891.72 : x
  2. Step 2: Convert to fraction form
    217,385.32/299,987.94 = 121,891.72/x
  3. Step 3: Cross multiply
    217,385.32x = 299,987.94 × 121,891.72
  4. Step 4: Simplify right side
    217,385.32x = 36,566,045,985.86
  5. Step 5: Solve for x
    x = 36,566,045,985.86/217,385.32
  6. Step 6: Final answer
    x = 168,208.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.