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Finding the Fourth Proportional to 267,638.51, 401,436.91 and 99,079.54

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Solution

The fourth proportional to 267,638.51, 401,436.91 and 99,079.54 is: 148,611.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,638.51 : 401,436.91 = 99,079.54 : x
  2. Step 2: Convert to fraction form
    267,638.51/401,436.91 = 99,079.54/x
  3. Step 3: Cross multiply
    267,638.51x = 401,436.91 × 99,079.54
  4. Step 4: Simplify right side
    267,638.51x = 39,774,183,502.08
  5. Step 5: Solve for x
    x = 39,774,183,502.08/267,638.51
  6. Step 6: Final answer
    x = 148,611.58

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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.