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Finding the Fourth Proportional to 71,577.64, 98,775.61 and 39,745.99

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Solution

The fourth proportional to 71,577.64, 98,775.61 and 39,745.99 is: 54,848.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,577.64 : 98,775.61 = 39,745.99 : x
  2. Step 2: Convert to fraction form
    71,577.64/98,775.61 = 39,745.99/x
  3. Step 3: Cross multiply
    71,577.64x = 98,775.61 × 39,745.99
  4. Step 4: Simplify right side
    71,577.64x = 3,925,934,407.30
  5. Step 5: Solve for x
    x = 3,925,934,407.30/71,577.64
  6. Step 6: Final answer
    x = 54,848.61

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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.