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Finding the Fourth Proportional to 79,172.73, 109,231.20 and 45,156.74

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Solution

The fourth proportional to 79,172.73, 109,231.20 and 45,156.74 is: 62,300.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,172.73 : 109,231.20 = 45,156.74 : x
  2. Step 2: Convert to fraction form
    79,172.73/109,231.20 = 45,156.74/x
  3. Step 3: Cross multiply
    79,172.73x = 109,231.20 × 45,156.74
  4. Step 4: Simplify right side
    79,172.73x = 4,932,524,352.13
  5. Step 5: Solve for x
    x = 4,932,524,352.13/79,172.73
  6. Step 6: Final answer
    x = 62,300.80

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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.