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Finding the Fourth Proportional to 191,675.80, 287,513.70 and 86,699.80

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Solution

The fourth proportional to 191,675.80, 287,513.70 and 86,699.80 is: 130,049.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,675.80 : 287,513.70 = 86,699.80 : x
  2. Step 2: Convert to fraction form
    191,675.80/287,513.70 = 86,699.80/x
  3. Step 3: Cross multiply
    191,675.80x = 287,513.70 × 86,699.80
  4. Step 4: Simplify right side
    191,675.80x = 24,927,380,287.26
  5. Step 5: Solve for x
    x = 24,927,380,287.26/191,675.80
  6. Step 6: Final answer
    x = 130,049.70

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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.