Home / 149,389.16-206,154.41-81,406.62

Finding the Fourth Proportional to 149,389.16, 206,154.41 and 81,406.62

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Solution

The fourth proportional to 149,389.16, 206,154.41 and 81,406.62 is: 112,339.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,389.16 : 206,154.41 = 81,406.62 : x
  2. Step 2: Convert to fraction form
    149,389.16/206,154.41 = 81,406.62/x
  3. Step 3: Cross multiply
    149,389.16x = 206,154.41 × 81,406.62
  4. Step 4: Simplify right side
    149,389.16x = 16,782,333,309.16
  5. Step 5: Solve for x
    x = 16,782,333,309.16/149,389.16
  6. Step 6: Final answer
    x = 112,339.70

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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.