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Finding the Fourth Proportional to 121,718.61, 167,979.58 and 68,003.93

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Solution

The fourth proportional to 121,718.61, 167,979.58 and 68,003.93 is: 93,849.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,718.61 : 167,979.58 = 68,003.93 : x
  2. Step 2: Convert to fraction form
    121,718.61/167,979.58 = 68,003.93/x
  3. Step 3: Cross multiply
    121,718.61x = 167,979.58 × 68,003.93
  4. Step 4: Simplify right side
    121,718.61x = 11,423,271,849.69
  5. Step 5: Solve for x
    x = 11,423,271,849.69/121,718.61
  6. Step 6: Final answer
    x = 93,849.84

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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.