Home / 71,715.36-98,959.60-39,879.12

Finding the Fourth Proportional to 71,715.36, 98,959.60 and 39,879.12

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Solution

The fourth proportional to 71,715.36, 98,959.60 and 39,879.12 is: 55,028.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,715.36 : 98,959.60 = 39,879.12 : x
  2. Step 2: Convert to fraction form
    71,715.36/98,959.60 = 39,879.12/x
  3. Step 3: Cross multiply
    71,715.36x = 98,959.60 × 39,879.12
  4. Step 4: Simplify right side
    71,715.36x = 3,946,421,763.55
  5. Step 5: Solve for x
    x = 3,946,421,763.55/71,715.36
  6. Step 6: Final answer
    x = 55,028.96

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1.5x scale

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.