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Finding the Fourth Proportional to 218,781.93, 328,172.91 and 71,037.93

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Solution

The fourth proportional to 218,781.93, 328,172.91 and 71,037.93 is: 106,556.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,781.93 : 328,172.91 = 71,037.93 : x
  2. Step 2: Convert to fraction form
    218,781.93/328,172.91 = 71,037.93/x
  3. Step 3: Cross multiply
    218,781.93x = 328,172.91 × 71,037.93
  4. Step 4: Simplify right side
    218,781.93x = 23,312,724,208.48
  5. Step 5: Solve for x
    x = 23,312,724,208.48/218,781.93
  6. Step 6: Final answer
    x = 106,556.90

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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.