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Finding the Fourth Proportional to 186,643.80, 279,965.70 and 126,768.60

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Solution

The fourth proportional to 186,643.80, 279,965.70 and 126,768.60 is: 190,152.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,643.80 : 279,965.70 = 126,768.60 : x
  2. Step 2: Convert to fraction form
    186,643.80/279,965.70 = 126,768.60/x
  3. Step 3: Cross multiply
    186,643.80x = 279,965.70 × 126,768.60
  4. Step 4: Simplify right side
    186,643.80x = 35,490,859,837.02
  5. Step 5: Solve for x
    x = 35,490,859,837.02/186,643.80
  6. Step 6: Final answer
    x = 190,152.90

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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.