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Finding the Fourth Proportional to 85,644.76, 118,190 and 47,406.96

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Solution

The fourth proportional to 85,644.76, 118,190 and 47,406.96 is: 65,421.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,644.76 : 118,190 = 47,406.96 : x
  2. Step 2: Convert to fraction form
    85,644.76/118,190 = 47,406.96/x
  3. Step 3: Cross multiply
    85,644.76x = 118,190 × 47,406.96
  4. Step 4: Simplify right side
    85,644.76x = 5,603,028,602.40
  5. Step 5: Solve for x
    x = 5,603,028,602.40/85,644.76
  6. Step 6: Final answer
    x = 65,421.73

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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.