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Finding the Fourth Proportional to 153,578.11, 211,955.04 and 85,601.29

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Solution

The fourth proportional to 153,578.11, 211,955.04 and 85,601.29 is: 118,139.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,578.11 : 211,955.04 = 85,601.29 : x
  2. Step 2: Convert to fraction form
    153,578.11/211,955.04 = 85,601.29/x
  3. Step 3: Cross multiply
    153,578.11x = 211,955.04 × 85,601.29
  4. Step 4: Simplify right side
    153,578.11x = 18,143,624,846.00
  5. Step 5: Solve for x
    x = 18,143,624,846.00/153,578.11
  6. Step 6: Final answer
    x = 118,139.39

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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.