Home / 71,711.04-98,959.20-39,879.36

Finding the Fourth Proportional to 71,711.04, 98,959.20 and 39,879.36

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Solution

The fourth proportional to 71,711.04, 98,959.20 and 39,879.36 is: 55,032.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,711.04 : 98,959.20 = 39,879.36 : x
  2. Step 2: Convert to fraction form
    71,711.04/98,959.20 = 39,879.36/x
  3. Step 3: Cross multiply
    71,711.04x = 98,959.20 × 39,879.36
  4. Step 4: Simplify right side
    71,711.04x = 3,946,429,562.11
  5. Step 5: Solve for x
    x = 3,946,429,562.11/71,711.04
  6. Step 6: Final answer
    x = 55,032.39

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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.