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Finding the Fourth Proportional to 61,347.85, 84,634.88 and 38,679.60

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Solution

The fourth proportional to 61,347.85, 84,634.88 and 38,679.60 is: 53,361.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,347.85 : 84,634.88 = 38,679.60 : x
  2. Step 2: Convert to fraction form
    61,347.85/84,634.88 = 38,679.60/x
  3. Step 3: Cross multiply
    61,347.85x = 84,634.88 × 38,679.60
  4. Step 4: Simplify right side
    61,347.85x = 3,273,643,304.45
  5. Step 5: Solve for x
    x = 3,273,643,304.45/61,347.85
  6. Step 6: Final answer
    x = 53,361.99

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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.