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Finding the Fourth Proportional to 165,763.99, 248,720.01 and 86,860

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Solution

The fourth proportional to 165,763.99, 248,720.01 and 86,860 is: 130,328.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,763.99 : 248,720.01 = 86,860 : x
  2. Step 2: Convert to fraction form
    165,763.99/248,720.01 = 86,860/x
  3. Step 3: Cross multiply
    165,763.99x = 248,720.01 × 86,860
  4. Step 4: Simplify right side
    165,763.99x = 21,603,820,068.60
  5. Step 5: Solve for x
    x = 21,603,820,068.60/165,763.99
  6. Step 6: Final answer
    x = 130,328.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.