Home / 258,730.47-387,954.83-90,205.49

Finding the Fourth Proportional to 258,730.47, 387,954.83 and 90,205.49

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Solution

The fourth proportional to 258,730.47, 387,954.83 and 90,205.49 is: 135,259.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,730.47 : 387,954.83 = 90,205.49 : x
  2. Step 2: Convert to fraction form
    258,730.47/387,954.83 = 90,205.49/x
  3. Step 3: Cross multiply
    258,730.47x = 387,954.83 × 90,205.49
  4. Step 4: Simplify right side
    258,730.47x = 34,995,653,598.24
  5. Step 5: Solve for x
    x = 34,995,653,598.24/258,730.47
  6. Step 6: Final answer
    x = 135,259.11

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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.