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Finding the Fourth Proportional to 125,805.60, 188,741.20 and 46,920.50

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Solution

The fourth proportional to 125,805.60, 188,741.20 and 46,920.50 is: 70,392.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,805.60 : 188,741.20 = 46,920.50 : x
  2. Step 2: Convert to fraction form
    125,805.60/188,741.20 = 46,920.50/x
  3. Step 3: Cross multiply
    125,805.60x = 188,741.20 × 46,920.50
  4. Step 4: Simplify right side
    125,805.60x = 8,855,831,474.60
  5. Step 5: Solve for x
    x = 8,855,831,474.60/125,805.60
  6. Step 6: Final answer
    x = 70,392.98

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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.