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Finding the Fourth Proportional to 190,262.40, 285,396.40 and 90,432.78

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Solution

The fourth proportional to 190,262.40, 285,396.40 and 90,432.78 is: 135,650.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,262.40 : 285,396.40 = 90,432.78 : x
  2. Step 2: Convert to fraction form
    190,262.40/285,396.40 = 90,432.78/x
  3. Step 3: Cross multiply
    190,262.40x = 285,396.40 × 90,432.78
  4. Step 4: Simplify right side
    190,262.40x = 25,809,189,853.99
  5. Step 5: Solve for x
    x = 25,809,189,853.99/190,262.40
  6. Step 6: Final answer
    x = 135,650.50

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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.