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Finding the Fourth Proportional to 221,999.79, 306,353.48 and 121,395.63

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Solution

The fourth proportional to 221,999.79, 306,353.48 and 121,395.63 is: 167,522.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,999.79 : 306,353.48 = 121,395.63 : x
  2. Step 2: Convert to fraction form
    221,999.79/306,353.48 = 121,395.63/x
  3. Step 3: Cross multiply
    221,999.79x = 306,353.48 × 121,395.63
  4. Step 4: Simplify right side
    221,999.79x = 37,189,973,707.29
  5. Step 5: Solve for x
    x = 37,189,973,707.29/221,999.79
  6. Step 6: Final answer
    x = 167,522.56

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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.