Home / 77,918.09-107,543.69-49,219.50

Finding the Fourth Proportional to 77,918.09, 107,543.69 and 49,219.50

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Solution

The fourth proportional to 77,918.09, 107,543.69 and 49,219.50 is: 67,933.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,918.09 : 107,543.69 = 49,219.50 : x
  2. Step 2: Convert to fraction form
    77,918.09/107,543.69 = 49,219.50/x
  3. Step 3: Cross multiply
    77,918.09x = 107,543.69 × 49,219.50
  4. Step 4: Simplify right side
    77,918.09x = 5,293,246,403.86
  5. Step 5: Solve for x
    x = 5,293,246,403.86/77,918.09
  6. Step 6: Final answer
    x = 67,933.47

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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.