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Finding the Fourth Proportional to 261,172.43, 391,747.68 and 83,675.51

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Solution

The fourth proportional to 261,172.43, 391,747.68 and 83,675.51 is: 125,509.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,172.43 : 391,747.68 = 83,675.51 : x
  2. Step 2: Convert to fraction form
    261,172.43/391,747.68 = 83,675.51/x
  3. Step 3: Cross multiply
    261,172.43x = 391,747.68 × 83,675.51
  4. Step 4: Simplify right side
    261,172.43x = 32,779,684,956.58
  5. Step 5: Solve for x
    x = 32,779,684,956.58/261,172.43
  6. Step 6: Final answer
    x = 125,509.75

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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.