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Finding the Fourth Proportional to 79,418.70, 109,584.81 and 45,421.71

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Solution

The fourth proportional to 79,418.70, 109,584.81 and 45,421.71 is: 62,674.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,418.70 : 109,584.81 = 45,421.71 : x
  2. Step 2: Convert to fraction form
    79,418.70/109,584.81 = 45,421.71/x
  3. Step 3: Cross multiply
    79,418.70x = 109,584.81 × 45,421.71
  4. Step 4: Simplify right side
    79,418.70x = 4,977,529,460.23
  5. Step 5: Solve for x
    x = 4,977,529,460.23/79,418.70
  6. Step 6: Final answer
    x = 62,674.53

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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.