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Finding the Fourth Proportional to 121,805.06, 168,086.88 and 85,559.00

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Solution

The fourth proportional to 121,805.06, 168,086.88 and 85,559.00 is: 118,068.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,805.06 : 168,086.88 = 85,559.00 : x
  2. Step 2: Convert to fraction form
    121,805.06/168,086.88 = 85,559.00/x
  3. Step 3: Cross multiply
    121,805.06x = 168,086.88 × 85,559.00
  4. Step 4: Simplify right side
    121,805.06x = 14,381,344,525.49
  5. Step 5: Solve for x
    x = 14,381,344,525.49/121,805.06
  6. Step 6: Final answer
    x = 118,068.54

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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.