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Finding the Fourth Proportional to 190,449.99, 285,428.93 and 90,640.77

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Solution

The fourth proportional to 190,449.99, 285,428.93 and 90,640.77 is: 135,844.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,449.99 : 285,428.93 = 90,640.77 : x
  2. Step 2: Convert to fraction form
    190,449.99/285,428.93 = 90,640.77/x
  3. Step 3: Cross multiply
    190,449.99x = 285,428.93 × 90,640.77
  4. Step 4: Simplify right side
    190,449.99x = 25,871,497,995.48
  5. Step 5: Solve for x
    x = 25,871,497,995.48/190,449.99
  6. Step 6: Final answer
    x = 135,844.05

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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.