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Finding the Fourth Proportional to 78,865.81, 118,200.26 and 39,434.20

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Solution

The fourth proportional to 78,865.81, 118,200.26 and 39,434.20 is: 59,102.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,865.81 : 118,200.26 = 39,434.20 : x
  2. Step 2: Convert to fraction form
    78,865.81/118,200.26 = 39,434.20/x
  3. Step 3: Cross multiply
    78,865.81x = 118,200.26 × 39,434.20
  4. Step 4: Simplify right side
    78,865.81x = 4,661,132,692.89
  5. Step 5: Solve for x
    x = 4,661,132,692.89/78,865.81
  6. Step 6: Final answer
    x = 59,102.07

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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.