Home / 190,139.28-285,039.72-90,237.84

Finding the Fourth Proportional to 190,139.28, 285,039.72 and 90,237.84

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Solution

The fourth proportional to 190,139.28, 285,039.72 and 90,237.84 is: 135,276.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,139.28 : 285,039.72 = 90,237.84 : x
  2. Step 2: Convert to fraction form
    190,139.28/285,039.72 = 90,237.84/x
  3. Step 3: Cross multiply
    190,139.28x = 285,039.72 × 90,237.84
  4. Step 4: Simplify right side
    190,139.28x = 25,721,368,647.00
  5. Step 5: Solve for x
    x = 25,721,368,647.00/190,139.28
  6. Step 6: Final answer
    x = 135,276.46

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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.