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Finding the Fourth Proportional to 157,770.18, 217,720.71 and 86,153.22

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Solution

The fourth proportional to 157,770.18, 217,720.71 and 86,153.22 is: 118,890.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,770.18 : 217,720.71 = 86,153.22 : x
  2. Step 2: Convert to fraction form
    157,770.18/217,720.71 = 86,153.22/x
  3. Step 3: Cross multiply
    157,770.18x = 217,720.71 × 86,153.22
  4. Step 4: Simplify right side
    157,770.18x = 18,757,340,227.19
  5. Step 5: Solve for x
    x = 18,757,340,227.19/157,770.18
  6. Step 6: Final answer
    x = 118,890.28

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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.