Home / 105,537.59-145,642.10-57,140.03

Finding the Fourth Proportional to 105,537.59, 145,642.10 and 57,140.03

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Solution

The fourth proportional to 105,537.59, 145,642.10 and 57,140.03 is: 78,853.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,537.59 : 145,642.10 = 57,140.03 : x
  2. Step 2: Convert to fraction form
    105,537.59/145,642.10 = 57,140.03/x
  3. Step 3: Cross multiply
    105,537.59x = 145,642.10 × 57,140.03
  4. Step 4: Simplify right side
    105,537.59x = 8,321,992,949.35
  5. Step 5: Solve for x
    x = 8,321,992,949.35/105,537.59
  6. Step 6: Final answer
    x = 78,853.36

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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.