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Finding the Fourth Proportional to 155,683, 214,842.78 and 88,615

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Solution

The fourth proportional to 155,683, 214,842.78 and 88,615 is: 122,288.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,683 : 214,842.78 = 88,615 : x
  2. Step 2: Convert to fraction form
    155,683/214,842.78 = 88,615/x
  3. Step 3: Cross multiply
    155,683x = 214,842.78 × 88,615
  4. Step 4: Simplify right side
    155,683x = 19,038,292,949.70
  5. Step 5: Solve for x
    x = 19,038,292,949.70/155,683
  6. Step 6: Final answer
    x = 122,288.84

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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.