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Finding the Fourth Proportional to 80,575.55, 120,915.80 and 30,656.08

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Solution

The fourth proportional to 80,575.55, 120,915.80 and 30,656.08 is: 46,004.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,575.55 : 120,915.80 = 30,656.08 : x
  2. Step 2: Convert to fraction form
    80,575.55/120,915.80 = 30,656.08/x
  3. Step 3: Cross multiply
    80,575.55x = 120,915.80 × 30,656.08
  4. Step 4: Simplify right side
    80,575.55x = 3,706,804,537.72
  5. Step 5: Solve for x
    x = 3,706,804,537.72/80,575.55
  6. Step 6: Final answer
    x = 46,004.09

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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.