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Finding the Fourth Proportional to 61,620.64, 85,036.80 and 34,762.24

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Solution

The fourth proportional to 61,620.64, 85,036.80 and 34,762.24 is: 47,972.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,620.64 : 85,036.80 = 34,762.24 : x
  2. Step 2: Convert to fraction form
    61,620.64/85,036.80 = 34,762.24/x
  3. Step 3: Cross multiply
    61,620.64x = 85,036.80 × 34,762.24
  4. Step 4: Simplify right side
    61,620.64x = 2,956,069,650.43
  5. Step 5: Solve for x
    x = 2,956,069,650.43/61,620.64
  6. Step 6: Final answer
    x = 47,972.07

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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.