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Finding the Fourth Proportional to 61,347.72, 84,634.70 and 38,679.48

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Solution

The fourth proportional to 61,347.72, 84,634.70 and 38,679.48 is: 53,361.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,347.72 : 84,634.70 = 38,679.48 : x
  2. Step 2: Convert to fraction form
    61,347.72/84,634.70 = 38,679.48/x
  3. Step 3: Cross multiply
    61,347.72x = 84,634.70 × 38,679.48
  4. Step 4: Simplify right side
    61,347.72x = 3,273,626,185.96
  5. Step 5: Solve for x
    x = 3,273,626,185.96/61,347.72
  6. Step 6: Final answer
    x = 53,361.82

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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.