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Finding the Fourth Proportional to 128,055.20, 191,929.20 and 65,693.60

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Solution

The fourth proportional to 128,055.20, 191,929.20 and 65,693.60 is: 98,461.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,055.20 : 191,929.20 = 65,693.60 : x
  2. Step 2: Convert to fraction form
    128,055.20/191,929.20 = 65,693.60/x
  3. Step 3: Cross multiply
    128,055.20x = 191,929.20 × 65,693.60
  4. Step 4: Simplify right side
    128,055.20x = 12,608,520,093.12
  5. Step 5: Solve for x
    x = 12,608,520,093.12/128,055.20
  6. Step 6: Final answer
    x = 98,461.60

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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.