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Finding the Fourth Proportional to 86,554.66, 129,888.76 and 30,393.32

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Solution

The fourth proportional to 86,554.66, 129,888.76 and 30,393.32 is: 45,609.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,554.66 : 129,888.76 = 30,393.32 : x
  2. Step 2: Convert to fraction form
    86,554.66/129,888.76 = 30,393.32/x
  3. Step 3: Cross multiply
    86,554.66x = 129,888.76 × 30,393.32
  4. Step 4: Simplify right side
    86,554.66x = 3,947,750,647.08
  5. Step 5: Solve for x
    x = 3,947,750,647.08/86,554.66
  6. Step 6: Final answer
    x = 45,609.91

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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.