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Finding the Fourth Proportional to 221,879.16, 306,193.50 and 121,277.16

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Solution

The fourth proportional to 221,879.16, 306,193.50 and 121,277.16 is: 167,362.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,879.16 : 306,193.50 = 121,277.16 : x
  2. Step 2: Convert to fraction form
    221,879.16/306,193.50 = 121,277.16/x
  3. Step 3: Cross multiply
    221,879.16x = 306,193.50 × 121,277.16
  4. Step 4: Simplify right side
    221,879.16x = 37,134,278,090.46
  5. Step 5: Solve for x
    x = 37,134,278,090.46/221,879.16
  6. Step 6: Final answer
    x = 167,362.62

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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.