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Finding the Fourth Proportional to 151,511.68, 209,086.53 and 91,116.91

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Solution

The fourth proportional to 151,511.68, 209,086.53 and 91,116.91 is: 125,741.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,511.68 : 209,086.53 = 91,116.91 : x
  2. Step 2: Convert to fraction form
    151,511.68/209,086.53 = 91,116.91/x
  3. Step 3: Cross multiply
    151,511.68x = 209,086.53 × 91,116.91
  4. Step 4: Simplify right side
    151,511.68x = 19,051,318,536.22
  5. Step 5: Solve for x
    x = 19,051,318,536.22/151,511.68
  6. Step 6: Final answer
    x = 125,741.58

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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.