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Finding the Fourth Proportional to 219,885.40, 303,436.26 and 123,090.40

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Solution

The fourth proportional to 219,885.40, 303,436.26 and 123,090.40 is: 169,861.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,885.40 : 303,436.26 = 123,090.40 : x
  2. Step 2: Convert to fraction form
    219,885.40/303,436.26 = 123,090.40/x
  3. Step 3: Cross multiply
    219,885.40x = 303,436.26 × 123,090.40
  4. Step 4: Simplify right side
    219,885.40x = 37,350,090,617.90
  5. Step 5: Solve for x
    x = 37,350,090,617.90/219,885.40
  6. Step 6: Final answer
    x = 169,861.62

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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.