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Finding the Fourth Proportional to 61,408.70, 84,742.71 and 34,550.90

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Solution

The fourth proportional to 61,408.70, 84,742.71 and 34,550.90 is: 47,679.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,408.70 : 84,742.71 = 34,550.90 : x
  2. Step 2: Convert to fraction form
    61,408.70/84,742.71 = 34,550.90/x
  3. Step 3: Cross multiply
    61,408.70x = 84,742.71 × 34,550.90
  4. Step 4: Simplify right side
    61,408.70x = 2,927,936,898.94
  5. Step 5: Solve for x
    x = 2,927,936,898.94/61,408.70
  6. Step 6: Final answer
    x = 47,679.51

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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.