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Finding the Fourth Proportional to 85,990.78, 118,669.35 and 48,268.54

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Solution

The fourth proportional to 85,990.78, 118,669.35 and 48,268.54 is: 66,611.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,990.78 : 118,669.35 = 48,268.54 : x
  2. Step 2: Convert to fraction form
    85,990.78/118,669.35 = 48,268.54/x
  3. Step 3: Cross multiply
    85,990.78x = 118,669.35 × 48,268.54
  4. Step 4: Simplify right side
    85,990.78x = 5,727,996,267.25
  5. Step 5: Solve for x
    x = 5,727,996,267.25/85,990.78
  6. Step 6: Final answer
    x = 66,611.75

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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.