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Finding the Fourth Proportional to 79,090, 109,143.38 and 45,104.02

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Solution

The fourth proportional to 79,090, 109,143.38 and 45,104.02 is: 62,243.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,090 : 109,143.38 = 45,104.02 : x
  2. Step 2: Convert to fraction form
    79,090/109,143.38 = 45,104.02/x
  3. Step 3: Cross multiply
    79,090x = 109,143.38 × 45,104.02
  4. Step 4: Simplify right side
    79,090x = 4,922,805,194.39
  5. Step 5: Solve for x
    x = 4,922,805,194.39/79,090
  6. Step 6: Final answer
    x = 62,243.08

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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.