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Finding the Fourth Proportional to 154,871.36, 213,787.72 and 104,638.40

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Solution

The fourth proportional to 154,871.36, 213,787.72 and 104,638.40 is: 144,445.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,871.36 : 213,787.72 = 104,638.40 : x
  2. Step 2: Convert to fraction form
    154,871.36/213,787.72 = 104,638.40/x
  3. Step 3: Cross multiply
    154,871.36x = 213,787.72 × 104,638.40
  4. Step 4: Simplify right side
    154,871.36x = 22,370,404,960.45
  5. Step 5: Solve for x
    x = 22,370,404,960.45/154,871.36
  6. Step 6: Final answer
    x = 144,445.07

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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.