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Finding the Fourth Proportional to 191,910.72, 287,900.64 and 91,986.24

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Solution

The fourth proportional to 191,910.72, 287,900.64 and 91,986.24 is: 137,995.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,910.72 : 287,900.64 = 91,986.24 : x
  2. Step 2: Convert to fraction form
    191,910.72/287,900.64 = 91,986.24/x
  3. Step 3: Cross multiply
    191,910.72x = 287,900.64 × 91,986.24
  4. Step 4: Simplify right side
    191,910.72x = 26,482,897,367.19
  5. Step 5: Solve for x
    x = 26,482,897,367.19/191,910.72
  6. Step 6: Final answer
    x = 137,995.93

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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.