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Finding the Fourth Proportional to 61,371, 84,684.78 and 34,512.12

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Solution

The fourth proportional to 61,371, 84,684.78 and 34,512.12 is: 47,622.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,371 : 84,684.78 = 34,512.12 : x
  2. Step 2: Convert to fraction form
    61,371/84,684.78 = 34,512.12/x
  3. Step 3: Cross multiply
    61,371x = 84,684.78 × 34,512.12
  4. Step 4: Simplify right side
    61,371x = 2,922,651,289.53
  5. Step 5: Solve for x
    x = 2,922,651,289.53/61,371
  6. Step 6: Final answer
    x = 47,622.68

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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.