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Finding the Fourth Proportional to 61,134.48, 84,372.84 and 39,975.12

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Solution

The fourth proportional to 61,134.48, 84,372.84 and 39,975.12 is: 55,170.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,134.48 : 84,372.84 = 39,975.12 : x
  2. Step 2: Convert to fraction form
    61,134.48/84,372.84 = 39,975.12/x
  3. Step 3: Cross multiply
    61,134.48x = 84,372.84 × 39,975.12
  4. Step 4: Simplify right side
    61,134.48x = 3,372,814,403.74
  5. Step 5: Solve for x
    x = 3,372,814,403.74/61,134.48
  6. Step 6: Final answer
    x = 55,170.41

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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.