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Finding the Fourth Proportional to 128,835,672.60, 193,253,508.90 and 114,726,898.20

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Solution

The fourth proportional to 128,835,672.60, 193,253,508.90 and 114,726,898.20 is: 172,090,347.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,835,672.60 : 193,253,508.90 = 114,726,898.20 : x
  2. Step 2: Convert to fraction form
    128,835,672.60/193,253,508.90 = 114,726,898.20/x
  3. Step 3: Cross multiply
    128,835,672.60x = 193,253,508.90 × 114,726,898.20
  4. Step 4: Simplify right side
    128,835,672.60x = 22,171,375,642,363,096
  5. Step 5: Solve for x
    x = 22,171,375,642,363,096/128,835,672.60
  6. Step 6: Final answer
    x = 172,090,347.30

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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.