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Finding the Fourth Proportional to 261,647.40, 392,616.90 and 111,862.20

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Solution

The fourth proportional to 261,647.40, 392,616.90 and 111,862.20 is: 167,855.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,647.40 : 392,616.90 = 111,862.20 : x
  2. Step 2: Convert to fraction form
    261,647.40/392,616.90 = 111,862.20/x
  3. Step 3: Cross multiply
    261,647.40x = 392,616.90 × 111,862.20
  4. Step 4: Simplify right side
    261,647.40x = 43,918,990,191.18
  5. Step 5: Solve for x
    x = 43,918,990,191.18/261,647.40
  6. Step 6: Final answer
    x = 167,855.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.