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Finding the Fourth Proportional to 86,135, 118,873.86 and 48,409.52

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Solution

The fourth proportional to 86,135, 118,873.86 and 48,409.52 is: 66,809.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,135 : 118,873.86 = 48,409.52 : x
  2. Step 2: Convert to fraction form
    86,135/118,873.86 = 48,409.52/x
  3. Step 3: Cross multiply
    86,135x = 118,873.86 × 48,409.52
  4. Step 4: Simplify right side
    86,135x = 5,754,626,503.15
  5. Step 5: Solve for x
    x = 5,754,626,503.15/86,135
  6. Step 6: Final answer
    x = 66,809.39

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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.