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Finding the Fourth Proportional to 218,969.55, 328,227.53 and 118,918.35

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Solution

The fourth proportional to 218,969.55, 328,227.53 and 118,918.35 is: 178,254.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,969.55 : 328,227.53 = 118,918.35 : x
  2. Step 2: Convert to fraction form
    218,969.55/328,227.53 = 118,918.35/x
  3. Step 3: Cross multiply
    218,969.55x = 328,227.53 × 118,918.35
  4. Step 4: Simplify right side
    218,969.55x = 39,032,275,697.58
  5. Step 5: Solve for x
    x = 39,032,275,697.58/218,969.55
  6. Step 6: Final answer
    x = 178,254.35

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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.