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Finding the Fourth Proportional to 157,998.33, 218,038.48 and 86,378.36

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Solution

The fourth proportional to 157,998.33, 218,038.48 and 86,378.36 is: 119,202.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,998.33 : 218,038.48 = 86,378.36 : x
  2. Step 2: Convert to fraction form
    157,998.33/218,038.48 = 86,378.36/x
  3. Step 3: Cross multiply
    157,998.33x = 218,038.48 × 86,378.36
  4. Step 4: Simplify right side
    157,998.33x = 18,833,805,013.15
  5. Step 5: Solve for x
    x = 18,833,805,013.15/157,998.33
  6. Step 6: Final answer
    x = 119,202.56

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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.