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Finding the Fourth Proportional to 100,921.80, 150,673.08 and 77,104.56

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Solution

The fourth proportional to 100,921.80, 150,673.08 and 77,104.56 is: 115,114.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,921.80 : 150,673.08 = 77,104.56 : x
  2. Step 2: Convert to fraction form
    100,921.80/150,673.08 = 77,104.56/x
  3. Step 3: Cross multiply
    100,921.80x = 150,673.08 × 77,104.56
  4. Step 4: Simplify right side
    100,921.80x = 11,617,581,537.24
  5. Step 5: Solve for x
    x = 11,617,581,537.24/100,921.80
  6. Step 6: Final answer
    x = 115,114.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.