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Finding the Fourth Proportional to 221,615.04, 305,828.28 and 121,013.04

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Solution

The fourth proportional to 221,615.04, 305,828.28 and 121,013.04 is: 166,997.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,615.04 : 305,828.28 = 121,013.04 : x
  2. Step 2: Convert to fraction form
    221,615.04/305,828.28 = 121,013.04/x
  3. Step 3: Cross multiply
    221,615.04x = 305,828.28 × 121,013.04
  4. Step 4: Simplify right side
    221,615.04x = 37,009,209,880.77
  5. Step 5: Solve for x
    x = 37,009,209,880.77/221,615.04
  6. Step 6: Final answer
    x = 166,997.74

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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.