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Finding the Fourth Proportional to 218,608.21, 301,671.37 and 121,807.07

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Solution

The fourth proportional to 218,608.21, 301,671.37 and 121,807.07 is: 168,089.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,608.21 : 301,671.37 = 121,807.07 : x
  2. Step 2: Convert to fraction form
    218,608.21/301,671.37 = 121,807.07/x
  3. Step 3: Cross multiply
    218,608.21x = 301,671.37 × 121,807.07
  4. Step 4: Simplify right side
    218,608.21x = 36,745,703,869.71
  5. Step 5: Solve for x
    x = 36,745,703,869.71/218,608.21
  6. Step 6: Final answer
    x = 168,089.31

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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.