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Finding the Fourth Proportional to 183,128.11, 252,129.31 and 142,790.11

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Solution

The fourth proportional to 183,128.11, 252,129.31 and 142,790.11 is: 196,592.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    183,128.11 : 252,129.31 = 142,790.11 : x
  2. Step 2: Convert to fraction form
    183,128.11/252,129.31 = 142,790.11/x
  3. Step 3: Cross multiply
    183,128.11x = 252,129.31 × 142,790.11
  4. Step 4: Simplify right side
    183,128.11x = 36,001,571,909.12
  5. Step 5: Solve for x
    x = 36,001,571,909.12/183,128.11
  6. Step 6: Final answer
    x = 196,592.28

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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.