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Finding the Fourth Proportional to 123,047.88, 169,806.90 and 72,090.78

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Solution

The fourth proportional to 123,047.88, 169,806.90 and 72,090.78 is: 99,485.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,047.88 : 169,806.90 = 72,090.78 : x
  2. Step 2: Convert to fraction form
    123,047.88/169,806.90 = 72,090.78/x
  3. Step 3: Cross multiply
    123,047.88x = 169,806.90 × 72,090.78
  4. Step 4: Simplify right side
    123,047.88x = 12,241,511,870.38
  5. Step 5: Solve for x
    x = 12,241,511,870.38/123,047.88
  6. Step 6: Final answer
    x = 99,485.76

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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.