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Finding the Fourth Proportional to 221,667.54, 305,900.73 and 121,065.54

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Solution

The fourth proportional to 221,667.54, 305,900.73 and 121,065.54 is: 167,070.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,667.54 : 305,900.73 = 121,065.54 : x
  2. Step 2: Convert to fraction form
    221,667.54/305,900.73 = 121,065.54/x
  3. Step 3: Cross multiply
    221,667.54x = 305,900.73 × 121,065.54
  4. Step 4: Simplify right side
    221,667.54x = 37,034,037,063.84
  5. Step 5: Solve for x
    x = 37,034,037,063.84/221,667.54
  6. Step 6: Final answer
    x = 167,070.19

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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.