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Finding the Fourth Proportional to 191,745.80, 287,618.70 and 86,769.80

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Solution

The fourth proportional to 191,745.80, 287,618.70 and 86,769.80 is: 130,154.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,745.80 : 287,618.70 = 86,769.80 : x
  2. Step 2: Convert to fraction form
    191,745.80/287,618.70 = 86,769.80/x
  3. Step 3: Cross multiply
    191,745.80x = 287,618.70 × 86,769.80
  4. Step 4: Simplify right side
    191,745.80x = 24,956,617,075.26
  5. Step 5: Solve for x
    x = 24,956,617,075.26/191,745.80
  6. Step 6: Final answer
    x = 130,154.70

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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.