Home / 105,735.49-145,919.19-57,990.58

Finding the Fourth Proportional to 105,735.49, 145,919.19 and 57,990.58

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Solution

The fourth proportional to 105,735.49, 145,919.19 and 57,990.58 is: 80,029.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,735.49 : 145,919.19 = 57,990.58 : x
  2. Step 2: Convert to fraction form
    105,735.49/145,919.19 = 57,990.58/x
  3. Step 3: Cross multiply
    105,735.49x = 145,919.19 × 57,990.58
  4. Step 4: Simplify right side
    105,735.49x = 8,461,938,461.23
  5. Step 5: Solve for x
    x = 8,461,938,461.23/105,735.49
  6. Step 6: Final answer
    x = 80,029.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.