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Finding the Fourth Proportional to 74,407.72, 111,611.76 and 18,248.08

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Solution

The fourth proportional to 74,407.72, 111,611.76 and 18,248.08 is: 27,372.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,407.72 : 111,611.76 = 18,248.08 : x
  2. Step 2: Convert to fraction form
    74,407.72/111,611.76 = 18,248.08/x
  3. Step 3: Cross multiply
    74,407.72x = 111,611.76 × 18,248.08
  4. Step 4: Simplify right side
    74,407.72x = 2,036,700,325.42
  5. Step 5: Solve for x
    x = 2,036,700,325.42/74,407.72
  6. Step 6: Final answer
    x = 27,372.16

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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.