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Finding the Fourth Proportional to 86,611.84, 129,891.36 and 45,036.16

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Solution

The fourth proportional to 86,611.84, 129,891.36 and 45,036.16 is: 67,540.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,611.84 : 129,891.36 = 45,036.16 : x
  2. Step 2: Convert to fraction form
    86,611.84/129,891.36 = 45,036.16/x
  3. Step 3: Cross multiply
    86,611.84x = 129,891.36 × 45,036.16
  4. Step 4: Simplify right side
    86,611.84x = 5,849,808,071.58
  5. Step 5: Solve for x
    x = 5,849,808,071.58/86,611.84
  6. Step 6: Final answer
    x = 67,540.51

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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.