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Finding the Fourth Proportional to 157,612.89, 217,506.51 and 85,994.40

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Solution

The fourth proportional to 157,612.89, 217,506.51 and 85,994.40 is: 118,672.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,612.89 : 217,506.51 = 85,994.40 : x
  2. Step 2: Convert to fraction form
    157,612.89/217,506.51 = 85,994.40/x
  3. Step 3: Cross multiply
    157,612.89x = 217,506.51 × 85,994.40
  4. Step 4: Simplify right side
    157,612.89x = 18,704,341,823.54
  5. Step 5: Solve for x
    x = 18,704,341,823.54/157,612.89
  6. Step 6: Final answer
    x = 118,672.67

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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.