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Finding the Fourth Proportional to 86,294.49, 128,836.45 and 73,012.11

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Solution

The fourth proportional to 86,294.49, 128,836.45 and 73,012.11 is: 109,006.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,294.49 : 128,836.45 = 73,012.11 : x
  2. Step 2: Convert to fraction form
    86,294.49/128,836.45 = 73,012.11/x
  3. Step 3: Cross multiply
    86,294.49x = 128,836.45 × 73,012.11
  4. Step 4: Simplify right side
    86,294.49x = 9,406,621,059.41
  5. Step 5: Solve for x
    x = 9,406,621,059.41/86,294.49
  6. Step 6: Final answer
    x = 109,006.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.