Home / 218,787.28-301,899.20-121,967.36

Finding the Fourth Proportional to 218,787.28, 301,899.20 and 121,967.36

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Solution

The fourth proportional to 218,787.28, 301,899.20 and 121,967.36 is: 168,299.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,787.28 : 301,899.20 = 121,967.36 : x
  2. Step 2: Convert to fraction form
    218,787.28/301,899.20 = 121,967.36/x
  3. Step 3: Cross multiply
    218,787.28x = 301,899.20 × 121,967.36
  4. Step 4: Simplify right side
    218,787.28x = 36,821,848,410.11
  5. Step 5: Solve for x
    x = 36,821,848,410.11/218,787.28
  6. Step 6: Final answer
    x = 168,299.77

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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.