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Finding the Fourth Proportional to 86,572.80, 129,832.20 and 33,998.40

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Solution

The fourth proportional to 86,572.80, 129,832.20 and 33,998.40 is: 50,987.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,572.80 : 129,832.20 = 33,998.40 : x
  2. Step 2: Convert to fraction form
    86,572.80/129,832.20 = 33,998.40/x
  3. Step 3: Cross multiply
    86,572.80x = 129,832.20 × 33,998.40
  4. Step 4: Simplify right side
    86,572.80x = 4,414,087,068.48
  5. Step 5: Solve for x
    x = 4,414,087,068.48/86,572.80
  6. Step 6: Final answer
    x = 50,987.00

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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.