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Finding the Fourth Proportional to 128,765.40, 193,148.10 and 119,434.20

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Solution

The fourth proportional to 128,765.40, 193,148.10 and 119,434.20 is: 179,151.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,765.40 : 193,148.10 = 119,434.20 : x
  2. Step 2: Convert to fraction form
    128,765.40/193,148.10 = 119,434.20/x
  3. Step 3: Cross multiply
    128,765.40x = 193,148.10 × 119,434.20
  4. Step 4: Simplify right side
    128,765.40x = 23,068,488,805.02
  5. Step 5: Solve for x
    x = 23,068,488,805.02/128,765.40
  6. Step 6: Final answer
    x = 179,151.30

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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.