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Finding the Fourth Proportional to 149,018.71, 205,651.23 and 85,368.81

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Solution

The fourth proportional to 149,018.71, 205,651.23 and 85,368.81 is: 117,812.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,018.71 : 205,651.23 = 85,368.81 : x
  2. Step 2: Convert to fraction form
    149,018.71/205,651.23 = 85,368.81/x
  3. Step 3: Cross multiply
    149,018.71x = 205,651.23 × 85,368.81
  4. Step 4: Simplify right side
    149,018.71x = 17,556,199,325.04
  5. Step 5: Solve for x
    x = 17,556,199,325.04/149,018.71
  6. Step 6: Final answer
    x = 117,812.05

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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.