Home / 71,750.08-99,015.60-39,920.32

Finding the Fourth Proportional to 71,750.08, 99,015.60 and 39,920.32

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Solution

The fourth proportional to 71,750.08, 99,015.60 and 39,920.32 is: 55,090.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,750.08 : 99,015.60 = 39,920.32 : x
  2. Step 2: Convert to fraction form
    71,750.08/99,015.60 = 39,920.32/x
  3. Step 3: Cross multiply
    71,750.08x = 99,015.60 × 39,920.32
  4. Step 4: Simplify right side
    71,750.08x = 3,952,734,436.99
  5. Step 5: Solve for x
    x = 3,952,734,436.99/71,750.08
  6. Step 6: Final answer
    x = 55,090.31

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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.