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Finding the Fourth Proportional to 113,643.87, 156,835.59 and 62,656.51

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Solution

The fourth proportional to 113,643.87, 156,835.59 and 62,656.51 is: 86,469.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,643.87 : 156,835.59 = 62,656.51 : x
  2. Step 2: Convert to fraction form
    113,643.87/156,835.59 = 62,656.51/x
  3. Step 3: Cross multiply
    113,643.87x = 156,835.59 × 62,656.51
  4. Step 4: Simplify right side
    113,643.87x = 9,826,770,870.08
  5. Step 5: Solve for x
    x = 9,826,770,870.08/113,643.87
  6. Step 6: Final answer
    x = 86,469.87

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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.