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Finding the Fourth Proportional to 39,920.58, 59,881.44 and 19,139.22

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Solution

The fourth proportional to 39,920.58, 59,881.44 and 19,139.22 is: 28,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,920.58 : 59,881.44 = 19,139.22 : x
  2. Step 2: Convert to fraction form
    39,920.58/59,881.44 = 19,139.22/x
  3. Step 3: Cross multiply
    39,920.58x = 59,881.44 × 19,139.22
  4. Step 4: Simplify right side
    39,920.58x = 1,146,084,054.08
  5. Step 5: Solve for x
    x = 1,146,084,054.08/39,920.58
  6. Step 6: Final answer
    x = 28,709.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.