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Finding the Fourth Proportional to 132,601, 182,989.38 and 72,985

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Solution

The fourth proportional to 132,601, 182,989.38 and 72,985 is: 100,719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,601 : 182,989.38 = 72,985 : x
  2. Step 2: Convert to fraction form
    132,601/182,989.38 = 72,985/x
  3. Step 3: Cross multiply
    132,601x = 182,989.38 × 72,985
  4. Step 4: Simplify right side
    132,601x = 13,355,479,899.30
  5. Step 5: Solve for x
    x = 13,355,479,899.30/132,601
  6. Step 6: Final answer
    x = 100,719.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.