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Finding the Fourth Proportional to 221,925, 306,257.58 and 121,323

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Solution

The fourth proportional to 221,925, 306,257.58 and 121,323 is: 167,426.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,925 : 306,257.58 = 121,323 : x
  2. Step 2: Convert to fraction form
    221,925/306,257.58 = 121,323/x
  3. Step 3: Cross multiply
    221,925x = 306,257.58 × 121,323
  4. Step 4: Simplify right side
    221,925x = 37,156,088,378.34
  5. Step 5: Solve for x
    x = 37,156,088,378.34/221,925
  6. Step 6: Final answer
    x = 167,426.33

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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.