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Finding the Fourth Proportional to 157,016.45, 216,683.72 and 85,396.99

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Solution

The fourth proportional to 157,016.45, 216,683.72 and 85,396.99 is: 117,848.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,016.45 : 216,683.72 = 85,396.99 : x
  2. Step 2: Convert to fraction form
    157,016.45/216,683.72 = 85,396.99/x
  3. Step 3: Cross multiply
    157,016.45x = 216,683.72 × 85,396.99
  4. Step 4: Simplify right side
    157,016.45x = 18,504,137,470.00
  5. Step 5: Solve for x
    x = 18,504,137,470.00/157,016.45
  6. Step 6: Final answer
    x = 117,848.40

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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.