Home / 81,018.90-121,489.47-41,555.70

Finding the Fourth Proportional to 81,018.90, 121,489.47 and 41,555.70

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Solution

The fourth proportional to 81,018.90, 121,489.47 and 41,555.70 is: 62,313.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,018.90 : 121,489.47 = 41,555.70 : x
  2. Step 2: Convert to fraction form
    81,018.90/121,489.47 = 41,555.70/x
  3. Step 3: Cross multiply
    81,018.90x = 121,489.47 × 41,555.70
  4. Step 4: Simplify right side
    81,018.90x = 5,048,579,968.48
  5. Step 5: Solve for x
    x = 5,048,579,968.48/81,018.90
  6. Step 6: Final answer
    x = 62,313.61

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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.