Home / 78,063.80-107,699.19-51,242.75

Finding the Fourth Proportional to 78,063.80, 107,699.19 and 51,242.75

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Solution

The fourth proportional to 78,063.80, 107,699.19 and 51,242.75 is: 70,696.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,063.80 : 107,699.19 = 51,242.75 : x
  2. Step 2: Convert to fraction form
    78,063.80/107,699.19 = 51,242.75/x
  3. Step 3: Cross multiply
    78,063.80x = 107,699.19 × 51,242.75
  4. Step 4: Simplify right side
    78,063.80x = 5,518,802,129.88
  5. Step 5: Solve for x
    x = 5,518,802,129.88/78,063.80
  6. Step 6: Final answer
    x = 70,696.05

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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.