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Finding the Fourth Proportional to 157,970.88, 217,999.28 and 86,350.88

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Solution

The fourth proportional to 157,970.88, 217,999.28 and 86,350.88 is: 119,163.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,970.88 : 217,999.28 = 86,350.88 : x
  2. Step 2: Convert to fraction form
    157,970.88/217,999.28 = 86,350.88/x
  3. Step 3: Cross multiply
    157,970.88x = 217,999.28 × 86,350.88
  4. Step 4: Simplify right side
    157,970.88x = 18,824,429,667.37
  5. Step 5: Solve for x
    x = 18,824,429,667.37/157,970.88
  6. Step 6: Final answer
    x = 119,163.92

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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.