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Finding the Fourth Proportional to 157,991.06, 218,027.63 and 86,371.07

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Solution

The fourth proportional to 157,991.06, 218,027.63 and 86,371.07 is: 119,192.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,991.06 : 218,027.63 = 86,371.07 : x
  2. Step 2: Convert to fraction form
    157,991.06/218,027.63 = 86,371.07/x
  3. Step 3: Cross multiply
    157,991.06x = 218,027.63 × 86,371.07
  4. Step 4: Simplify right side
    157,991.06x = 18,831,278,818.45
  5. Step 5: Solve for x
    x = 18,831,278,818.45/157,991.06
  6. Step 6: Final answer
    x = 119,192.05

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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.