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Finding the Fourth Proportional to 190,053.46, 285,074.31 and 90,285.46

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Solution

The fourth proportional to 190,053.46, 285,074.31 and 90,285.46 is: 135,425.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,053.46 : 285,074.31 = 90,285.46 : x
  2. Step 2: Convert to fraction form
    190,053.46/285,074.31 = 90,285.46/x
  3. Step 3: Cross multiply
    190,053.46x = 285,074.31 × 90,285.46
  4. Step 4: Simplify right side
    190,053.46x = 25,738,065,212.53
  5. Step 5: Solve for x
    x = 25,738,065,212.53/190,053.46
  6. Step 6: Final answer
    x = 135,425.40

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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.