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Finding the Fourth Proportional to 270,642.40, 405,963.60 and 83,672.80

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Solution

The fourth proportional to 270,642.40, 405,963.60 and 83,672.80 is: 125,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,642.40 : 405,963.60 = 83,672.80 : x
  2. Step 2: Convert to fraction form
    270,642.40/405,963.60 = 83,672.80/x
  3. Step 3: Cross multiply
    270,642.40x = 405,963.60 × 83,672.80
  4. Step 4: Simplify right side
    270,642.40x = 33,968,111,110.08
  5. Step 5: Solve for x
    x = 33,968,111,110.08/270,642.40
  6. Step 6: Final answer
    x = 125,509.20

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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.