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Finding the Fourth Proportional to 190,264.64, 285,400.16 and 71,991.68

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Solution

The fourth proportional to 190,264.64, 285,400.16 and 71,991.68 is: 107,988.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,264.64 : 285,400.16 = 71,991.68 : x
  2. Step 2: Convert to fraction form
    190,264.64/285,400.16 = 71,991.68/x
  3. Step 3: Cross multiply
    190,264.64x = 285,400.16 × 71,991.68
  4. Step 4: Simplify right side
    190,264.64x = 20,546,436,990.67
  5. Step 5: Solve for x
    x = 20,546,436,990.67/190,264.64
  6. Step 6: Final answer
    x = 107,988.73

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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.