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Finding the Fourth Proportional to 191,855.58, 287,990.73 and 81,125.34

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Solution

The fourth proportional to 191,855.58, 287,990.73 and 81,125.34 is: 121,775.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,855.58 : 287,990.73 = 81,125.34 : x
  2. Step 2: Convert to fraction form
    191,855.58/287,990.73 = 81,125.34/x
  3. Step 3: Cross multiply
    191,855.58x = 287,990.73 × 81,125.34
  4. Step 4: Simplify right side
    191,855.58x = 23,363,345,888.10
  5. Step 5: Solve for x
    x = 23,363,345,888.10/191,855.58
  6. Step 6: Final answer
    x = 121,775.69

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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.