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Finding the Fourth Proportional to 191,703.40, 287,555.10 and 108,759.40

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Solution

The fourth proportional to 191,703.40, 287,555.10 and 108,759.40 is: 163,139.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,703.40 : 287,555.10 = 108,759.40 : x
  2. Step 2: Convert to fraction form
    191,703.40/287,555.10 = 108,759.40/x
  3. Step 3: Cross multiply
    191,703.40x = 287,555.10 × 108,759.40
  4. Step 4: Simplify right side
    191,703.40x = 31,274,320,142.94
  5. Step 5: Solve for x
    x = 31,274,320,142.94/191,703.40
  6. Step 6: Final answer
    x = 163,139.10

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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.