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Finding the Fourth Proportional to 128,993.53, 178,095.38 and 83,800.32

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Solution

The fourth proportional to 128,993.53, 178,095.38 and 83,800.32 is: 115,699.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,993.53 : 178,095.38 = 83,800.32 : x
  2. Step 2: Convert to fraction form
    128,993.53/178,095.38 = 83,800.32/x
  3. Step 3: Cross multiply
    128,993.53x = 178,095.38 × 83,800.32
  4. Step 4: Simplify right side
    128,993.53x = 14,924,449,329.50
  5. Step 5: Solve for x
    x = 14,924,449,329.50/128,993.53
  6. Step 6: Final answer
    x = 115,699.21

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1.5x scale

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.