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Finding the Fourth Proportional to 191,985.28, 288,012.10 and 65,639.57

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Solution

The fourth proportional to 191,985.28, 288,012.10 and 65,639.57 is: 98,471.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,985.28 : 288,012.10 = 65,639.57 : x
  2. Step 2: Convert to fraction form
    191,985.28/288,012.10 = 65,639.57/x
  3. Step 3: Cross multiply
    191,985.28x = 288,012.10 × 65,639.57
  4. Step 4: Simplify right side
    191,985.28x = 18,904,990,398.80
  5. Step 5: Solve for x
    x = 18,904,990,398.80/191,985.28
  6. Step 6: Final answer
    x = 98,471.04

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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.