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Finding the Fourth Proportional to 191,812.80, 288,021.60 and 112,987.20

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Solution

The fourth proportional to 191,812.80, 288,021.60 and 112,987.20 is: 169,658.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,812.80 : 288,021.60 = 112,987.20 : x
  2. Step 2: Convert to fraction form
    191,812.80/288,021.60 = 112,987.20/x
  3. Step 3: Cross multiply
    191,812.80x = 288,021.60 × 112,987.20
  4. Step 4: Simplify right side
    191,812.80x = 32,542,754,123.52
  5. Step 5: Solve for x
    x = 32,542,754,123.52/191,812.80
  6. Step 6: Final answer
    x = 169,658.93

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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.