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Finding the Fourth Proportional to 151,989.40, 209,797.86 and 104,400.28

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Solution

The fourth proportional to 151,989.40, 209,797.86 and 104,400.28 is: 144,108.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,989.40 : 209,797.86 = 104,400.28 : x
  2. Step 2: Convert to fraction form
    151,989.40/209,797.86 = 104,400.28/x
  3. Step 3: Cross multiply
    151,989.40x = 209,797.86 × 104,400.28
  4. Step 4: Simplify right side
    151,989.40x = 21,902,955,327.40
  5. Step 5: Solve for x
    x = 21,902,955,327.40/151,989.40
  6. Step 6: Final answer
    x = 144,108.44

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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.