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Finding the Fourth Proportional to 115,199, 159,027.90 and 81,235.16

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Solution

The fourth proportional to 115,199, 159,027.90 and 81,235.16 is: 112,142.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,199 : 159,027.90 = 81,235.16 : x
  2. Step 2: Convert to fraction form
    115,199/159,027.90 = 81,235.16/x
  3. Step 3: Cross multiply
    115,199x = 159,027.90 × 81,235.16
  4. Step 4: Simplify right side
    115,199x = 12,918,656,900.96
  5. Step 5: Solve for x
    x = 12,918,656,900.96/115,199
  6. Step 6: Final answer
    x = 112,142.09

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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.