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Finding the Fourth Proportional to 70,659.96, 97,513.20 and 38,831.76

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Solution

The fourth proportional to 70,659.96, 97,513.20 and 38,831.76 is: 53,589.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,659.96 : 97,513.20 = 38,831.76 : x
  2. Step 2: Convert to fraction form
    70,659.96/97,513.20 = 38,831.76/x
  3. Step 3: Cross multiply
    70,659.96x = 97,513.20 × 38,831.76
  4. Step 4: Simplify right side
    70,659.96x = 3,786,609,179.23
  5. Step 5: Solve for x
    x = 3,786,609,179.23/70,659.96
  6. Step 6: Final answer
    x = 53,589.18

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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.