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Finding the Fourth Proportional to 157,609.86, 217,501.20 and 85,989.84

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Solution

The fourth proportional to 157,609.86, 217,501.20 and 85,989.84 is: 118,665.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,609.86 : 217,501.20 = 85,989.84 : x
  2. Step 2: Convert to fraction form
    157,609.86/217,501.20 = 85,989.84/x
  3. Step 3: Cross multiply
    157,609.86x = 217,501.20 × 85,989.84
  4. Step 4: Simplify right side
    157,609.86x = 18,702,893,387.81
  5. Step 5: Solve for x
    x = 18,702,893,387.81/157,609.86
  6. Step 6: Final answer
    x = 118,665.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.