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Finding the Fourth Proportional to 191,698.80, 287,548.20 and 86,722.80

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Solution

The fourth proportional to 191,698.80, 287,548.20 and 86,722.80 is: 130,084.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,698.80 : 287,548.20 = 86,722.80 : x
  2. Step 2: Convert to fraction form
    191,698.80/287,548.20 = 86,722.80/x
  3. Step 3: Cross multiply
    191,698.80x = 287,548.20 × 86,722.80
  4. Step 4: Simplify right side
    191,698.80x = 24,936,985,038.96
  5. Step 5: Solve for x
    x = 24,936,985,038.96/191,698.80
  6. Step 6: Final answer
    x = 130,084.20

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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.