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Finding the Fourth Proportional to 78,897.89, 118,346.85 and 19,733.57

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Solution

The fourth proportional to 78,897.89, 118,346.85 and 19,733.57 is: 29,600.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897.89 : 118,346.85 = 19,733.57 : x
  2. Step 2: Convert to fraction form
    78,897.89/118,346.85 = 19,733.57/x
  3. Step 3: Cross multiply
    78,897.89x = 118,346.85 × 19,733.57
  4. Step 4: Simplify right side
    78,897.89x = 2,335,405,257.02
  5. Step 5: Solve for x
    x = 2,335,405,257.02/78,897.89
  6. Step 6: Final answer
    x = 29,600.35

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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.