Home / 121,938.86-168,282.16-68,220.66

Finding the Fourth Proportional to 121,938.86, 168,282.16 and 68,220.66

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Solution

The fourth proportional to 121,938.86, 168,282.16 and 68,220.66 is: 94,148.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,938.86 : 168,282.16 = 68,220.66 : x
  2. Step 2: Convert to fraction form
    121,938.86/168,282.16 = 68,220.66/x
  3. Step 3: Cross multiply
    121,938.86x = 168,282.16 × 68,220.66
  4. Step 4: Simplify right side
    121,938.86x = 11,480,319,850.87
  5. Step 5: Solve for x
    x = 11,480,319,850.87/121,938.86
  6. Step 6: Final answer
    x = 94,148.17

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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.