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Finding the Fourth Proportional to 153,589.90, 211,956.18 and 85,604.98

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Solution

The fourth proportional to 153,589.90, 211,956.18 and 85,604.98 is: 118,136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,589.90 : 211,956.18 = 85,604.98 : x
  2. Step 2: Convert to fraction form
    153,589.90/211,956.18 = 85,604.98/x
  3. Step 3: Cross multiply
    153,589.90x = 211,956.18 × 85,604.98
  4. Step 4: Simplify right side
    153,589.90x = 18,144,504,549.78
  5. Step 5: Solve for x
    x = 18,144,504,549.78/153,589.90
  6. Step 6: Final answer
    x = 118,136.05

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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.