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Finding the Fourth Proportional to 46,720.80, 70,090.43 and 17,138.89

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Solution

The fourth proportional to 46,720.80, 70,090.43 and 17,138.89 is: 25,711.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,720.80 : 70,090.43 = 17,138.89 : x
  2. Step 2: Convert to fraction form
    46,720.80/70,090.43 = 17,138.89/x
  3. Step 3: Cross multiply
    46,720.80x = 70,090.43 × 17,138.89
  4. Step 4: Simplify right side
    46,720.80x = 1,201,272,169.82
  5. Step 5: Solve for x
    x = 1,201,272,169.82/46,720.80
  6. Step 6: Final answer
    x = 25,711.72

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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.