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Finding the Fourth Proportional to 221,892.57, 306,211.74 and 121,290.57

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Solution

The fourth proportional to 221,892.57, 306,211.74 and 121,290.57 is: 167,380.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,892.57 : 306,211.74 = 121,290.57 : x
  2. Step 2: Convert to fraction form
    221,892.57/306,211.74 = 121,290.57/x
  3. Step 3: Cross multiply
    221,892.57x = 306,211.74 × 121,290.57
  4. Step 4: Simplify right side
    221,892.57x = 37,140,596,485.29
  5. Step 5: Solve for x
    x = 37,140,596,485.29/221,892.57
  6. Step 6: Final answer
    x = 167,380.98

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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.