Home / 78,077.96-107,736-47,435.12

Finding the Fourth Proportional to 78,077.96, 107,736 and 47,435.12

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Solution

The fourth proportional to 78,077.96, 107,736 and 47,435.12 is: 65,453.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,077.96 : 107,736 = 47,435.12 : x
  2. Step 2: Convert to fraction form
    78,077.96/107,736 = 47,435.12/x
  3. Step 3: Cross multiply
    78,077.96x = 107,736 × 47,435.12
  4. Step 4: Simplify right side
    78,077.96x = 5,110,470,088.32
  5. Step 5: Solve for x
    x = 5,110,470,088.32/78,077.96
  6. Step 6: Final answer
    x = 65,453.43

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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.