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Finding the Fourth Proportional to 191,803.80, 288,008.10 and 112,978.20

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Solution

The fourth proportional to 191,803.80, 288,008.10 and 112,978.20 is: 169,645.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,803.80 : 288,008.10 = 112,978.20 : x
  2. Step 2: Convert to fraction form
    191,803.80/288,008.10 = 112,978.20/x
  3. Step 3: Cross multiply
    191,803.80x = 288,008.10 × 112,978.20
  4. Step 4: Simplify right side
    191,803.80x = 32,538,636,723.42
  5. Step 5: Solve for x
    x = 32,538,636,723.42/191,803.80
  6. Step 6: Final answer
    x = 169,645.42

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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.