Home / 105,138.43-145,143.07-64,874.37

Finding the Fourth Proportional to 105,138.43, 145,143.07 and 64,874.37

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Solution

The fourth proportional to 105,138.43, 145,143.07 and 64,874.37 is: 89,558.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,138.43 : 145,143.07 = 64,874.37 : x
  2. Step 2: Convert to fraction form
    105,138.43/145,143.07 = 64,874.37/x
  3. Step 3: Cross multiply
    105,138.43x = 145,143.07 × 64,874.37
  4. Step 4: Simplify right side
    105,138.43x = 9,416,065,973.13
  5. Step 5: Solve for x
    x = 9,416,065,973.13/105,138.43
  6. Step 6: Final answer
    x = 89,558.75

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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.