Home / 190,261.40-285,394.90-90,431.78

Finding the Fourth Proportional to 190,261.40, 285,394.90 and 90,431.78

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Solution

The fourth proportional to 190,261.40, 285,394.90 and 90,431.78 is: 135,649.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,261.40 : 285,394.90 = 90,431.78 : x
  2. Step 2: Convert to fraction form
    190,261.40/285,394.90 = 90,431.78/x
  3. Step 3: Cross multiply
    190,261.40x = 285,394.90 × 90,431.78
  4. Step 4: Simplify right side
    190,261.40x = 25,808,768,809.92
  5. Step 5: Solve for x
    x = 25,808,768,809.92/190,261.40
  6. Step 6: Final answer
    x = 135,649.00

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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.