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Finding the Fourth Proportional to 123,096.80, 169,845.40 and 77,720.19

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Solution

The fourth proportional to 123,096.80, 169,845.40 and 77,720.19 is: 107,236.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,096.80 : 169,845.40 = 77,720.19 : x
  2. Step 2: Convert to fraction form
    123,096.80/169,845.40 = 77,720.19/x
  3. Step 3: Cross multiply
    123,096.80x = 169,845.40 × 77,720.19
  4. Step 4: Simplify right side
    123,096.80x = 13,200,416,758.63
  5. Step 5: Solve for x
    x = 13,200,416,758.63/123,096.80
  6. Step 6: Final answer
    x = 107,236.07

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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.