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Finding the Fourth Proportional to 153,782.35, 212,229.11 and 85,799.45

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Solution

The fourth proportional to 153,782.35, 212,229.11 and 85,799.45 is: 118,408.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,782.35 : 212,229.11 = 85,799.45 : x
  2. Step 2: Convert to fraction form
    153,782.35/212,229.11 = 85,799.45/x
  3. Step 3: Cross multiply
    153,782.35x = 212,229.11 × 85,799.45
  4. Step 4: Simplify right side
    153,782.35x = 18,209,141,657.06
  5. Step 5: Solve for x
    x = 18,209,141,657.06/153,782.35
  6. Step 6: Final answer
    x = 118,408.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.