Home / 71,977.01-99,328.43-40,145.09

Finding the Fourth Proportional to 71,977.01, 99,328.43 and 40,145.09

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Solution

The fourth proportional to 71,977.01, 99,328.43 and 40,145.09 is: 55,400.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,977.01 : 99,328.43 = 40,145.09 : x
  2. Step 2: Convert to fraction form
    71,977.01/99,328.43 = 40,145.09/x
  3. Step 3: Cross multiply
    71,977.01x = 99,328.43 × 40,145.09
  4. Step 4: Simplify right side
    71,977.01x = 3,987,548,561.18
  5. Step 5: Solve for x
    x = 3,987,548,561.18/71,977.01
  6. Step 6: Final answer
    x = 55,400.31

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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.