Home / 258,237.20-387,355.80-140,139.20

Finding the Fourth Proportional to 258,237.20, 387,355.80 and 140,139.20

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Solution

The fourth proportional to 258,237.20, 387,355.80 and 140,139.20 is: 210,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,237.20 : 387,355.80 = 140,139.20 : x
  2. Step 2: Convert to fraction form
    258,237.20/387,355.80 = 140,139.20/x
  3. Step 3: Cross multiply
    258,237.20x = 387,355.80 × 140,139.20
  4. Step 4: Simplify right side
    258,237.20x = 54,283,731,927.36
  5. Step 5: Solve for x
    x = 54,283,731,927.36/258,237.20
  6. Step 6: Final answer
    x = 210,208.80

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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.