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Finding the Fourth Proportional to 221,463.48, 305,615.34 and 120,862.20

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Solution

The fourth proportional to 221,463.48, 305,615.34 and 120,862.20 is: 166,787.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,463.48 : 305,615.34 = 120,862.20 : x
  2. Step 2: Convert to fraction form
    221,463.48/305,615.34 = 120,862.20/x
  3. Step 3: Cross multiply
    221,463.48x = 305,615.34 × 120,862.20
  4. Step 4: Simplify right side
    221,463.48x = 36,937,342,346.15
  5. Step 5: Solve for x
    x = 36,937,342,346.15/221,463.48
  6. Step 6: Final answer
    x = 166,787.51

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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.