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Finding the Fourth Proportional to 157,745.51, 217,687.16 and 86,125.31

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Solution

The fourth proportional to 157,745.51, 217,687.16 and 86,125.31 is: 118,852.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,745.51 : 217,687.16 = 86,125.31 : x
  2. Step 2: Convert to fraction form
    157,745.51/217,687.16 = 86,125.31/x
  3. Step 3: Cross multiply
    157,745.51x = 217,687.16 × 86,125.31
  4. Step 4: Simplify right side
    157,745.51x = 18,748,373,707.39
  5. Step 5: Solve for x
    x = 18,748,373,707.39/157,745.51
  6. Step 6: Final answer
    x = 118,852.03

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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.