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Finding the Fourth Proportional to 270,291.90, 405,092.79 and 128,136.90

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Solution

The fourth proportional to 270,291.90, 405,092.79 and 128,136.90 is: 192,041.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,291.90 : 405,092.79 = 128,136.90 : x
  2. Step 2: Convert to fraction form
    270,291.90/405,092.79 = 128,136.90/x
  3. Step 3: Cross multiply
    270,291.90x = 405,092.79 × 128,136.90
  4. Step 4: Simplify right side
    270,291.90x = 51,907,334,322.95
  5. Step 5: Solve for x
    x = 51,907,334,322.95/270,291.90
  6. Step 6: Final answer
    x = 192,041.77

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1.5x scale

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.