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Finding the Fourth Proportional to 157,680.81, 217,600.29 and 86,062.50

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Solution

The fourth proportional to 157,680.81, 217,600.29 and 86,062.50 is: 118,766.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,680.81 : 217,600.29 = 86,062.50 : x
  2. Step 2: Convert to fraction form
    157,680.81/217,600.29 = 86,062.50/x
  3. Step 3: Cross multiply
    157,680.81x = 217,600.29 × 86,062.50
  4. Step 4: Simplify right side
    157,680.81x = 18,727,224,958.13
  5. Step 5: Solve for x
    x = 18,727,224,958.13/157,680.81
  6. Step 6: Final answer
    x = 118,766.67

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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.