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Finding the Fourth Proportional to 157,879.92, 217,871.72 and 86,258.40

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Solution

The fourth proportional to 157,879.92, 217,871.72 and 86,258.40 is: 119,035.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,879.92 : 217,871.72 = 86,258.40 : x
  2. Step 2: Convert to fraction form
    157,879.92/217,871.72 = 86,258.40/x
  3. Step 3: Cross multiply
    157,879.92x = 217,871.72 × 86,258.40
  4. Step 4: Simplify right side
    157,879.92x = 18,793,265,541.16
  5. Step 5: Solve for x
    x = 18,793,265,541.16/157,879.92
  6. Step 6: Final answer
    x = 119,035.19

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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.