Home / 76,870.77-115,296.62-20,715.27

Finding the Fourth Proportional to 76,870.77, 115,296.62 and 20,715.27

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Solution

The fourth proportional to 76,870.77, 115,296.62 and 20,715.27 is: 31,070.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,870.77 : 115,296.62 = 20,715.27 : x
  2. Step 2: Convert to fraction form
    76,870.77/115,296.62 = 20,715.27/x
  3. Step 3: Cross multiply
    76,870.77x = 115,296.62 × 20,715.27
  4. Step 4: Simplify right side
    76,870.77x = 2,388,400,509.81
  5. Step 5: Solve for x
    x = 2,388,400,509.81/76,870.77
  6. Step 6: Final answer
    x = 31,070.33

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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.