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Finding the Fourth Proportional to 125,615.20, 188,131.20 and 122,699.20

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Solution

The fourth proportional to 125,615.20, 188,131.20 and 122,699.20 is: 183,763.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,615.20 : 188,131.20 = 122,699.20 : x
  2. Step 2: Convert to fraction form
    125,615.20/188,131.20 = 122,699.20/x
  3. Step 3: Cross multiply
    125,615.20x = 188,131.20 × 122,699.20
  4. Step 4: Simplify right side
    125,615.20x = 23,083,547,735.04
  5. Step 5: Solve for x
    x = 23,083,547,735.04/125,615.20
  6. Step 6: Final answer
    x = 183,763.97

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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.