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Finding the Fourth Proportional to 79,218.29, 109,330.43 and 45,231.63

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Solution

The fourth proportional to 79,218.29, 109,330.43 and 45,231.63 is: 62,424.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,218.29 : 109,330.43 = 45,231.63 : x
  2. Step 2: Convert to fraction form
    79,218.29/109,330.43 = 45,231.63/x
  3. Step 3: Cross multiply
    79,218.29x = 109,330.43 × 45,231.63
  4. Step 4: Simplify right side
    79,218.29x = 4,945,193,331.34
  5. Step 5: Solve for x
    x = 4,945,193,331.34/79,218.29
  6. Step 6: Final answer
    x = 62,424.90

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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.