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Finding the Fourth Proportional to 60,728.70, 91,056.60 and 31,204.20

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Solution

The fourth proportional to 60,728.70, 91,056.60 and 31,204.20 is: 46,787.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,728.70 : 91,056.60 = 31,204.20 : x
  2. Step 2: Convert to fraction form
    60,728.70/91,056.60 = 31,204.20/x
  3. Step 3: Cross multiply
    60,728.70x = 91,056.60 × 31,204.20
  4. Step 4: Simplify right side
    60,728.70x = 2,841,348,357.72
  5. Step 5: Solve for x
    x = 2,841,348,357.72/60,728.70
  6. Step 6: Final answer
    x = 46,787.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.