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Finding the Fourth Proportional to 191,091.72, 286,752.78 and 66,520.20

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Solution

The fourth proportional to 191,091.72, 286,752.78 and 66,520.20 is: 99,820.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,091.72 : 286,752.78 = 66,520.20 : x
  2. Step 2: Convert to fraction form
    191,091.72/286,752.78 = 66,520.20/x
  3. Step 3: Cross multiply
    191,091.72x = 286,752.78 × 66,520.20
  4. Step 4: Simplify right side
    191,091.72x = 19,074,852,276.16
  5. Step 5: Solve for x
    x = 19,074,852,276.16/191,091.72
  6. Step 6: Final answer
    x = 99,820.40

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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.