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Finding the Fourth Proportional to 154,347.48, 212,879.34 and 103,344

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Solution

The fourth proportional to 154,347.48, 212,879.34 and 103,344 is: 142,534.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,347.48 : 212,879.34 = 103,344 : x
  2. Step 2: Convert to fraction form
    154,347.48/212,879.34 = 103,344/x
  3. Step 3: Cross multiply
    154,347.48x = 212,879.34 × 103,344
  4. Step 4: Simplify right side
    154,347.48x = 21,999,802,512.96
  5. Step 5: Solve for x
    x = 21,999,802,512.96/154,347.48
  6. Step 6: Final answer
    x = 142,534.25

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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.