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Finding the Fourth Proportional to 113,302.99, 156,359.16 and 61,620.56

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Solution

The fourth proportional to 113,302.99, 156,359.16 and 61,620.56 is: 85,036.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,302.99 : 156,359.16 = 61,620.56 : x
  2. Step 2: Convert to fraction form
    113,302.99/156,359.16 = 61,620.56/x
  3. Step 3: Cross multiply
    113,302.99x = 156,359.16 × 61,620.56
  4. Step 4: Simplify right side
    113,302.99x = 9,634,939,684.40
  5. Step 5: Solve for x
    x = 9,634,939,684.40/113,302.99
  6. Step 6: Final answer
    x = 85,036.94

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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.