Home / 77,315.05-115,873.45-67,278.07

Finding the Fourth Proportional to 77,315.05, 115,873.45 and 67,278.07

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Solution

The fourth proportional to 77,315.05, 115,873.45 and 67,278.07 is: 100,830.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,315.05 : 115,873.45 = 67,278.07 : x
  2. Step 2: Convert to fraction form
    77,315.05/115,873.45 = 67,278.07/x
  3. Step 3: Cross multiply
    77,315.05x = 115,873.45 × 67,278.07
  4. Step 4: Simplify right side
    77,315.05x = 7,795,742,080.24
  5. Step 5: Solve for x
    x = 7,795,742,080.24/77,315.05
  6. Step 6: Final answer
    x = 100,830.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.