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Finding the Fourth Proportional to 61,867.28, 85,407 and 37,999.28

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Solution

The fourth proportional to 61,867.28, 85,407 and 37,999.28 is: 52,457.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,867.28 : 85,407 = 37,999.28 : x
  2. Step 2: Convert to fraction form
    61,867.28/85,407 = 37,999.28/x
  3. Step 3: Cross multiply
    61,867.28x = 85,407 × 37,999.28
  4. Step 4: Simplify right side
    61,867.28x = 3,245,404,506.96
  5. Step 5: Solve for x
    x = 3,245,404,506.96/61,867.28
  6. Step 6: Final answer
    x = 52,457.53

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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.