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Finding the Fourth Proportional to 191,089.72, 286,749.78 and 66,518.20

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Solution

The fourth proportional to 191,089.72, 286,749.78 and 66,518.20 is: 99,817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,089.72 : 286,749.78 = 66,518.20 : x
  2. Step 2: Convert to fraction form
    191,089.72/286,749.78 = 66,518.20/x
  3. Step 3: Cross multiply
    191,089.72x = 286,749.78 × 66,518.20
  4. Step 4: Simplify right side
    191,089.72x = 19,074,079,216.00
  5. Step 5: Solve for x
    x = 19,074,079,216.00/191,089.72
  6. Step 6: Final answer
    x = 99,817.40

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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.