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Finding the Fourth Proportional to 121,999.95, 168,359.87 and 68,284.95

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Solution

The fourth proportional to 121,999.95, 168,359.87 and 68,284.95 is: 94,233.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,999.95 : 168,359.87 = 68,284.95 : x
  2. Step 2: Convert to fraction form
    121,999.95/168,359.87 = 68,284.95/x
  3. Step 3: Cross multiply
    121,999.95x = 168,359.87 × 68,284.95
  4. Step 4: Simplify right side
    121,999.95x = 11,496,444,963.53
  5. Step 5: Solve for x
    x = 11,496,444,963.53/121,999.95
  6. Step 6: Final answer
    x = 94,233.19

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1.5x scale

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.