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Finding the Fourth Proportional to 72,638.37, 108,957.56 and 25,858.44

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Solution

The fourth proportional to 72,638.37, 108,957.56 and 25,858.44 is: 38,787.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,638.37 : 108,957.56 = 25,858.44 : x
  2. Step 2: Convert to fraction form
    72,638.37/108,957.56 = 25,858.44/x
  3. Step 3: Cross multiply
    72,638.37x = 108,957.56 × 25,858.44
  4. Step 4: Simplify right side
    72,638.37x = 2,817,472,398.51
  5. Step 5: Solve for x
    x = 2,817,472,398.51/72,638.37
  6. Step 6: Final answer
    x = 38,787.66

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1.5x scale

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.