Home / 90,783.28-136,196.79-28,453.78

Finding the Fourth Proportional to 90,783.28, 136,196.79 and 28,453.78

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Solution

The fourth proportional to 90,783.28, 136,196.79 and 28,453.78 is: 42,687.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,783.28 : 136,196.79 = 28,453.78 : x
  2. Step 2: Convert to fraction form
    90,783.28/136,196.79 = 28,453.78/x
  3. Step 3: Cross multiply
    90,783.28x = 136,196.79 × 28,453.78
  4. Step 4: Simplify right side
    90,783.28x = 3,875,313,722.96
  5. Step 5: Solve for x
    x = 3,875,313,722.96/90,783.28
  6. Step 6: Final answer
    x = 42,687.53

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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.