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Finding the Fourth Proportional to 201,906, 278,636.04 and 112,487.76

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Solution

The fourth proportional to 201,906, 278,636.04 and 112,487.76 is: 155,236.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,906 : 278,636.04 = 112,487.76 : x
  2. Step 2: Convert to fraction form
    201,906/278,636.04 = 112,487.76/x
  3. Step 3: Cross multiply
    201,906x = 278,636.04 × 112,487.76
  4. Step 4: Simplify right side
    201,906x = 31,343,143,994.87
  5. Step 5: Solve for x
    x = 31,343,143,994.87/201,906
  6. Step 6: Final answer
    x = 155,236.32

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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.