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Finding the Fourth Proportional to 221,908.77, 306,233.69 and 121,306.77

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Solution

The fourth proportional to 221,908.77, 306,233.69 and 121,306.77 is: 167,403.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,908.77 : 306,233.69 = 121,306.77 : x
  2. Step 2: Convert to fraction form
    221,908.77/306,233.69 = 121,306.77/x
  3. Step 3: Cross multiply
    221,908.77x = 306,233.69 × 121,306.77
  4. Step 4: Simplify right side
    221,908.77x = 37,148,219,192.55
  5. Step 5: Solve for x
    x = 37,148,219,192.55/221,908.77
  6. Step 6: Final answer
    x = 167,403.11

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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.