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Finding the Fourth Proportional to 61,781.50, 85,258.65 and 33,487.30

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Solution

The fourth proportional to 61,781.50, 85,258.65 and 33,487.30 is: 46,212.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,781.50 : 85,258.65 = 33,487.30 : x
  2. Step 2: Convert to fraction form
    61,781.50/85,258.65 = 33,487.30/x
  3. Step 3: Cross multiply
    61,781.50x = 85,258.65 × 33,487.30
  4. Step 4: Simplify right side
    61,781.50x = 2,855,081,990.15
  5. Step 5: Solve for x
    x = 2,855,081,990.15/61,781.50
  6. Step 6: Final answer
    x = 46,212.57

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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.