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Finding the Fourth Proportional to 260,681.95, 391,029.72 and 83,188.72

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Solution

The fourth proportional to 260,681.95, 391,029.72 and 83,188.72 is: 124,785.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,681.95 : 391,029.72 = 83,188.72 : x
  2. Step 2: Convert to fraction form
    260,681.95/391,029.72 = 83,188.72/x
  3. Step 3: Cross multiply
    260,681.95x = 391,029.72 × 83,188.72
  4. Step 4: Simplify right side
    260,681.95x = 32,529,261,888.76
  5. Step 5: Solve for x
    x = 32,529,261,888.76/260,681.95
  6. Step 6: Final answer
    x = 124,785.25

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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.