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Finding the Fourth Proportional to 72,062.40, 108,012.60 and 34,640.40

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Solution

The fourth proportional to 72,062.40, 108,012.60 and 34,640.40 is: 51,921.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,062.40 : 108,012.60 = 34,640.40 : x
  2. Step 2: Convert to fraction form
    72,062.40/108,012.60 = 34,640.40/x
  3. Step 3: Cross multiply
    72,062.40x = 108,012.60 × 34,640.40
  4. Step 4: Simplify right side
    72,062.40x = 3,741,599,669.04
  5. Step 5: Solve for x
    x = 3,741,599,669.04/72,062.40
  6. Step 6: Final answer
    x = 51,921.66

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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.