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Finding the Fourth Proportional to 153,164.71, 211,351.12 and 85,170.70

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Solution

The fourth proportional to 153,164.71, 211,351.12 and 85,170.70 is: 117,526.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,164.71 : 211,351.12 = 85,170.70 : x
  2. Step 2: Convert to fraction form
    153,164.71/211,351.12 = 85,170.70/x
  3. Step 3: Cross multiply
    153,164.71x = 211,351.12 × 85,170.70
  4. Step 4: Simplify right side
    153,164.71x = 18,000,922,887.45
  5. Step 5: Solve for x
    x = 18,000,922,887.45/153,164.71
  6. Step 6: Final answer
    x = 117,526.57

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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.