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Finding the Fourth Proportional to 86,561.40, 129,763.73 and 33,956.76

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Solution

The fourth proportional to 86,561.40, 129,763.73 and 33,956.76 is: 50,904.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,561.40 : 129,763.73 = 33,956.76 : x
  2. Step 2: Convert to fraction form
    86,561.40/129,763.73 = 33,956.76/x
  3. Step 3: Cross multiply
    86,561.40x = 129,763.73 × 33,956.76
  4. Step 4: Simplify right side
    86,561.40x = 4,406,355,921.21
  5. Step 5: Solve for x
    x = 4,406,355,921.21/86,561.40
  6. Step 6: Final answer
    x = 50,904.40

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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.