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Finding the Fourth Proportional to 143,769.80, 215,460.30 and 127,051.40

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Solution

The fourth proportional to 143,769.80, 215,460.30 and 127,051.40 is: 190,405.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,769.80 : 215,460.30 = 127,051.40 : x
  2. Step 2: Convert to fraction form
    143,769.80/215,460.30 = 127,051.40/x
  3. Step 3: Cross multiply
    143,769.80x = 215,460.30 × 127,051.40
  4. Step 4: Simplify right side
    143,769.80x = 27,374,532,759.42
  5. Step 5: Solve for x
    x = 27,374,532,759.42/143,769.80
  6. Step 6: Final answer
    x = 190,405.31

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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.