Home / 259,790.46-389,688.54-91,315.59

Finding the Fourth Proportional to 259,790.46, 389,688.54 and 91,315.59

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Solution

The fourth proportional to 259,790.46, 389,688.54 and 91,315.59 is: 136,974.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,790.46 : 389,688.54 = 91,315.59 : x
  2. Step 2: Convert to fraction form
    259,790.46/389,688.54 = 91,315.59/x
  3. Step 3: Cross multiply
    259,790.46x = 389,688.54 × 91,315.59
  4. Step 4: Simplify right side
    259,790.46x = 35,584,638,946.34
  5. Step 5: Solve for x
    x = 35,584,638,946.34/259,790.46
  6. Step 6: Final answer
    x = 136,974.39

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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.