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Finding the Fourth Proportional to 115,997.51, 160,087.79 and 65,018.90

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Solution

The fourth proportional to 115,997.51, 160,087.79 and 65,018.90 is: 89,732.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,997.51 : 160,087.79 = 65,018.90 : x
  2. Step 2: Convert to fraction form
    115,997.51/160,087.79 = 65,018.90/x
  3. Step 3: Cross multiply
    115,997.51x = 160,087.79 × 65,018.90
  4. Step 4: Simplify right side
    115,997.51x = 10,408,731,371.34
  5. Step 5: Solve for x
    x = 10,408,731,371.34/115,997.51
  6. Step 6: Final answer
    x = 89,732.37

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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.