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Finding the Fourth Proportional to 60,959.70, 91,403.10 and 31,435.20

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Solution

The fourth proportional to 60,959.70, 91,403.10 and 31,435.20 is: 47,134.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,959.70 : 91,403.10 = 31,435.20 : x
  2. Step 2: Convert to fraction form
    60,959.70/91,403.10 = 31,435.20/x
  3. Step 3: Cross multiply
    60,959.70x = 91,403.10 × 31,435.20
  4. Step 4: Simplify right side
    60,959.70x = 2,873,274,729.12
  5. Step 5: Solve for x
    x = 2,873,274,729.12/60,959.70
  6. Step 6: Final answer
    x = 47,134.00

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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.