Home / 121,918.28-168,261.18-68,216.90

Finding the Fourth Proportional to 121,918.28, 168,261.18 and 68,216.90

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Solution

The fourth proportional to 121,918.28, 168,261.18 and 68,216.90 is: 94,147.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,918.28 : 168,261.18 = 68,216.90 : x
  2. Step 2: Convert to fraction form
    121,918.28/168,261.18 = 68,216.90/x
  3. Step 3: Cross multiply
    121,918.28x = 168,261.18 × 68,216.90
  4. Step 4: Simplify right side
    121,918.28x = 11,478,256,089.94
  5. Step 5: Solve for x
    x = 11,478,256,089.94/121,918.28
  6. Step 6: Final answer
    x = 94,147.13

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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.