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Finding the Fourth Proportional to 157,855.79, 217,837.43 and 86,236.13

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Solution

The fourth proportional to 157,855.79, 217,837.43 and 86,236.13 is: 119,003.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,855.79 : 217,837.43 = 86,236.13 : x
  2. Step 2: Convert to fraction form
    157,855.79/217,837.43 = 86,236.13/x
  3. Step 3: Cross multiply
    157,855.79x = 217,837.43 × 86,236.13
  4. Step 4: Simplify right side
    157,855.79x = 18,785,456,501.17
  5. Step 5: Solve for x
    x = 18,785,456,501.17/157,855.79
  6. Step 6: Final answer
    x = 119,003.91

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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.