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Finding the Fourth Proportional to 236,902.50, 355,415.31 and 70,690.50

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Solution

The fourth proportional to 236,902.50, 355,415.31 and 70,690.50 is: 106,054.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,902.50 : 355,415.31 = 70,690.50 : x
  2. Step 2: Convert to fraction form
    236,902.50/355,415.31 = 70,690.50/x
  3. Step 3: Cross multiply
    236,902.50x = 355,415.31 × 70,690.50
  4. Step 4: Simplify right side
    236,902.50x = 25,124,485,971.56
  5. Step 5: Solve for x
    x = 25,124,485,971.56/236,902.50
  6. Step 6: Final answer
    x = 106,054.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.