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Finding the Fourth Proportional to 161,820.99, 223,309.78 and 90,196.74

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Solution

The fourth proportional to 161,820.99, 223,309.78 and 90,196.74 is: 124,469.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,820.99 : 223,309.78 = 90,196.74 : x
  2. Step 2: Convert to fraction form
    161,820.99/223,309.78 = 90,196.74/x
  3. Step 3: Cross multiply
    161,820.99x = 223,309.78 × 90,196.74
  4. Step 4: Simplify right side
    161,820.99x = 20,141,813,940.63
  5. Step 5: Solve for x
    x = 20,141,813,940.63/161,820.99
  6. Step 6: Final answer
    x = 124,469.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.