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Finding the Fourth Proportional to 149,561.88, 206,395.50 and 85,903.80

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Solution

The fourth proportional to 149,561.88, 206,395.50 and 85,903.80 is: 118,547.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,561.88 : 206,395.50 = 85,903.80 : x
  2. Step 2: Convert to fraction form
    149,561.88/206,395.50 = 85,903.80/x
  3. Step 3: Cross multiply
    149,561.88x = 206,395.50 × 85,903.80
  4. Step 4: Simplify right side
    149,561.88x = 17,730,157,752.90
  5. Step 5: Solve for x
    x = 17,730,157,752.90/149,561.88
  6. Step 6: Final answer
    x = 118,547.30

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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.