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Finding the Fourth Proportional to 128,097.90, 191,709.45 and 117,600.30

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Solution

The fourth proportional to 128,097.90, 191,709.45 and 117,600.30 is: 175,998.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,097.90 : 191,709.45 = 117,600.30 : x
  2. Step 2: Convert to fraction form
    128,097.90/191,709.45 = 117,600.30/x
  3. Step 3: Cross multiply
    128,097.90x = 191,709.45 × 117,600.30
  4. Step 4: Simplify right side
    128,097.90x = 22,545,088,832.84
  5. Step 5: Solve for x
    x = 22,545,088,832.84/128,097.90
  6. Step 6: Final answer
    x = 175,998.89

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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.