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Finding the Fourth Proportional to 218,740.50, 328,110.75 and 70,996.50

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Solution

The fourth proportional to 218,740.50, 328,110.75 and 70,996.50 is: 106,494.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,740.50 : 328,110.75 = 70,996.50 : x
  2. Step 2: Convert to fraction form
    218,740.50/328,110.75 = 70,996.50/x
  3. Step 3: Cross multiply
    218,740.50x = 328,110.75 × 70,996.50
  4. Step 4: Simplify right side
    218,740.50x = 23,294,714,862.38
  5. Step 5: Solve for x
    x = 23,294,714,862.38/218,740.50
  6. Step 6: Final answer
    x = 106,494.75

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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.