Home / 121,965.88-168,288.74-68,240.47

Finding the Fourth Proportional to 121,965.88, 168,288.74 and 68,240.47

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Solution

The fourth proportional to 121,965.88, 168,288.74 and 68,240.47 is: 94,158.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,965.88 : 168,288.74 = 68,240.47 : x
  2. Step 2: Convert to fraction form
    121,965.88/168,288.74 = 68,240.47/x
  3. Step 3: Cross multiply
    121,965.88x = 168,288.74 × 68,240.47
  4. Step 4: Simplify right side
    121,965.88x = 11,484,102,042.47
  5. Step 5: Solve for x
    x = 11,484,102,042.47/121,965.88
  6. Step 6: Final answer
    x = 94,158.32

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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.