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Finding the Fourth Proportional to 236,911.50, 355,428.81 and 70,699.50

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Solution

The fourth proportional to 236,911.50, 355,428.81 and 70,699.50 is: 106,067.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,911.50 : 355,428.81 = 70,699.50 : x
  2. Step 2: Convert to fraction form
    236,911.50/355,428.81 = 70,699.50/x
  3. Step 3: Cross multiply
    236,911.50x = 355,428.81 × 70,699.50
  4. Step 4: Simplify right side
    236,911.50x = 25,128,639,152.60
  5. Step 5: Solve for x
    x = 25,128,639,152.60/236,911.50
  6. Step 6: Final answer
    x = 106,067.62

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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.