Home / 258,828.12-388,335.60-90,373.28

Finding the Fourth Proportional to 258,828.12, 388,335.60 and 90,373.28

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Solution

The fourth proportional to 258,828.12, 388,335.60 and 90,373.28 is: 135,592.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,828.12 : 388,335.60 = 90,373.28 : x
  2. Step 2: Convert to fraction form
    258,828.12/388,335.60 = 90,373.28/x
  3. Step 3: Cross multiply
    258,828.12x = 388,335.60 × 90,373.28
  4. Step 4: Simplify right side
    258,828.12x = 35,095,159,971.09
  5. Step 5: Solve for x
    x = 35,095,159,971.09/258,828.12
  6. Step 6: Final answer
    x = 135,592.53

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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.