Home / 76,931.36-115,201.02-65,121.56

Finding the Fourth Proportional to 76,931.36, 115,201.02 and 65,121.56

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Solution

The fourth proportional to 76,931.36, 115,201.02 and 65,121.56 is: 97,516.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,931.36 : 115,201.02 = 65,121.56 : x
  2. Step 2: Convert to fraction form
    76,931.36/115,201.02 = 65,121.56/x
  3. Step 3: Cross multiply
    76,931.36x = 115,201.02 × 65,121.56
  4. Step 4: Simplify right side
    76,931.36x = 7,502,070,135.99
  5. Step 5: Solve for x
    x = 7,502,070,135.99/76,931.36
  6. Step 6: Final answer
    x = 97,516.41

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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.