Home / 78,120.09-107,828.55-45,863.06

Finding the Fourth Proportional to 78,120.09, 107,828.55 and 45,863.06

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Solution

The fourth proportional to 78,120.09, 107,828.55 and 45,863.06 is: 63,304.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,120.09 : 107,828.55 = 45,863.06 : x
  2. Step 2: Convert to fraction form
    78,120.09/107,828.55 = 45,863.06/x
  3. Step 3: Cross multiply
    78,120.09x = 107,828.55 × 45,863.06
  4. Step 4: Simplify right side
    78,120.09x = 4,945,346,719.22
  5. Step 5: Solve for x
    x = 4,945,346,719.22/78,120.09
  6. Step 6: Final answer
    x = 63,304.42

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1.5x scale

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.