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Finding the Fourth Proportional to 157,385.34, 217,192.05 and 85,765.68

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Solution

The fourth proportional to 157,385.34, 217,192.05 and 85,765.68 is: 118,356.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,385.34 : 217,192.05 = 85,765.68 : x
  2. Step 2: Convert to fraction form
    157,385.34/217,192.05 = 85,765.68/x
  3. Step 3: Cross multiply
    157,385.34x = 217,192.05 × 85,765.68
  4. Step 4: Simplify right side
    157,385.34x = 18,627,623,858.84
  5. Step 5: Solve for x
    x = 18,627,623,858.84/157,385.34
  6. Step 6: Final answer
    x = 118,356.79

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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.