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Finding the Fourth Proportional to 101,989.72, 140,745.36 and 56,675.08

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Solution

The fourth proportional to 101,989.72, 140,745.36 and 56,675.08 is: 78,211.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,989.72 : 140,745.36 = 56,675.08 : x
  2. Step 2: Convert to fraction form
    101,989.72/140,745.36 = 56,675.08/x
  3. Step 3: Cross multiply
    101,989.72x = 140,745.36 × 56,675.08
  4. Step 4: Simplify right side
    101,989.72x = 7,976,754,537.63
  5. Step 5: Solve for x
    x = 7,976,754,537.63/101,989.72
  6. Step 6: Final answer
    x = 78,211.36

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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.