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Finding the Fourth Proportional to 78,791.16, 118,187.01 and 19,626.72

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Solution

The fourth proportional to 78,791.16, 118,187.01 and 19,626.72 is: 29,440.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,791.16 : 118,187.01 = 19,626.72 : x
  2. Step 2: Convert to fraction form
    78,791.16/118,187.01 = 19,626.72/x
  3. Step 3: Cross multiply
    78,791.16x = 118,187.01 × 19,626.72
  4. Step 4: Simplify right side
    78,791.16x = 2,319,623,352.91
  5. Step 5: Solve for x
    x = 2,319,623,352.91/78,791.16
  6. Step 6: Final answer
    x = 29,440.15

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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.