Home / 258,918.56-388,528.88-109,149.76

Finding the Fourth Proportional to 258,918.56, 388,528.88 and 109,149.76

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Solution

The fourth proportional to 258,918.56, 388,528.88 and 109,149.76 is: 163,788.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,918.56 : 388,528.88 = 109,149.76 : x
  2. Step 2: Convert to fraction form
    258,918.56/388,528.88 = 109,149.76/x
  3. Step 3: Cross multiply
    258,918.56x = 388,528.88 × 109,149.76
  4. Step 4: Simplify right side
    258,918.56x = 42,407,834,005.07
  5. Step 5: Solve for x
    x = 42,407,834,005.07/258,918.56
  6. Step 6: Final answer
    x = 163,788.31

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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.