Home / 258,812.49-388,095.57-90,312.34

Finding the Fourth Proportional to 258,812.49, 388,095.57 and 90,312.34

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Solution

The fourth proportional to 258,812.49, 388,095.57 and 90,312.34 is: 135,425.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,812.49 : 388,095.57 = 90,312.34 : x
  2. Step 2: Convert to fraction form
    258,812.49/388,095.57 = 90,312.34/x
  3. Step 3: Cross multiply
    258,812.49x = 388,095.57 × 90,312.34
  4. Step 4: Simplify right side
    258,812.49x = 35,049,819,070.33
  5. Step 5: Solve for x
    x = 35,049,819,070.33/258,812.49
  6. Step 6: Final answer
    x = 135,425.53

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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.