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Finding the Fourth Proportional to 157,656, 217,569.87 and 86,040.60

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Solution

The fourth proportional to 157,656, 217,569.87 and 86,040.60 is: 118,738.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,656 : 217,569.87 = 86,040.60 : x
  2. Step 2: Convert to fraction form
    157,656/217,569.87 = 86,040.60/x
  3. Step 3: Cross multiply
    157,656x = 217,569.87 × 86,040.60
  4. Step 4: Simplify right side
    157,656x = 18,719,842,156.72
  5. Step 5: Solve for x
    x = 18,719,842,156.72/157,656
  6. Step 6: Final answer
    x = 118,738.53

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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.