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Finding the Fourth Proportional to 157,810.95, 217,775.75 and 86,191.27

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Solution

The fourth proportional to 157,810.95, 217,775.75 and 86,191.27 is: 118,942.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,810.95 : 217,775.75 = 86,191.27 : x
  2. Step 2: Convert to fraction form
    157,810.95/217,775.75 = 86,191.27/x
  3. Step 3: Cross multiply
    157,810.95x = 217,775.75 × 86,191.27
  4. Step 4: Simplify right side
    157,810.95x = 18,770,367,492.31
  5. Step 5: Solve for x
    x = 18,770,367,492.31/157,810.95
  6. Step 6: Final answer
    x = 118,942.11

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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.