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Finding the Fourth Proportional to 128,688.57, 193,030.12 and 35,194.32

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Solution

The fourth proportional to 128,688.57, 193,030.12 and 35,194.32 is: 52,790.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,688.57 : 193,030.12 = 35,194.32 : x
  2. Step 2: Convert to fraction form
    128,688.57/193,030.12 = 35,194.32/x
  3. Step 3: Cross multiply
    128,688.57x = 193,030.12 × 35,194.32
  4. Step 4: Simplify right side
    128,688.57x = 6,793,563,856.91
  5. Step 5: Solve for x
    x = 6,793,563,856.91/128,688.57
  6. Step 6: Final answer
    x = 52,790.73

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1.5x scale

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.