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Finding the Fourth Proportional to 157,539.05, 217,401.24 and 85,914.80

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Solution

The fourth proportional to 157,539.05, 217,401.24 and 85,914.80 is: 118,560.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,539.05 : 217,401.24 = 85,914.80 : x
  2. Step 2: Convert to fraction form
    157,539.05/217,401.24 = 85,914.80/x
  3. Step 3: Cross multiply
    157,539.05x = 217,401.24 × 85,914.80
  4. Step 4: Simplify right side
    157,539.05x = 18,677,984,054.35
  5. Step 5: Solve for x
    x = 18,677,984,054.35/157,539.05
  6. Step 6: Final answer
    x = 118,560.98

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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.