Home / 85,380.12-117,821.70-47,139.03

Finding the Fourth Proportional to 85,380.12, 117,821.70 and 47,139.03

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Solution

The fourth proportional to 85,380.12, 117,821.70 and 47,139.03 is: 65,050.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,380.12 : 117,821.70 = 47,139.03 : x
  2. Step 2: Convert to fraction form
    85,380.12/117,821.70 = 47,139.03/x
  3. Step 3: Cross multiply
    85,380.12x = 117,821.70 × 47,139.03
  4. Step 4: Simplify right side
    85,380.12x = 5,554,000,650.95
  5. Step 5: Solve for x
    x = 5,554,000,650.95/85,380.12
  6. Step 6: Final answer
    x = 65,050.28

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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.