Home / 71,830.80-99,130.05-39,999.03

Finding the Fourth Proportional to 71,830.80, 99,130.05 and 39,999.03

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Solution

The fourth proportional to 71,830.80, 99,130.05 and 39,999.03 is: 55,200.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,830.80 : 99,130.05 = 39,999.03 : x
  2. Step 2: Convert to fraction form
    71,830.80/99,130.05 = 39,999.03/x
  3. Step 3: Cross multiply
    71,830.80x = 99,130.05 × 39,999.03
  4. Step 4: Simplify right side
    71,830.80x = 3,965,105,843.85
  5. Step 5: Solve for x
    x = 3,965,105,843.85/71,830.80
  6. Step 6: Final answer
    x = 55,200.64

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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.