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Finding the Fourth Proportional to 157,178.91, 216,911.76 and 85,563.69

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Solution

The fourth proportional to 157,178.91, 216,911.76 and 85,563.69 is: 118,080.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,178.91 : 216,911.76 = 85,563.69 : x
  2. Step 2: Convert to fraction form
    157,178.91/216,911.76 = 85,563.69/x
  3. Step 3: Cross multiply
    157,178.91x = 216,911.76 × 85,563.69
  4. Step 4: Simplify right side
    157,178.91x = 18,559,770,589.99
  5. Step 5: Solve for x
    x = 18,559,770,589.99/157,178.91
  6. Step 6: Final answer
    x = 118,080.54

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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.