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Finding the Fourth Proportional to 86,538.60, 129,807.90 and 53,296.20

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Solution

The fourth proportional to 86,538.60, 129,807.90 and 53,296.20 is: 79,944.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,538.60 : 129,807.90 = 53,296.20 : x
  2. Step 2: Convert to fraction form
    86,538.60/129,807.90 = 53,296.20/x
  3. Step 3: Cross multiply
    86,538.60x = 129,807.90 × 53,296.20
  4. Step 4: Simplify right side
    86,538.60x = 6,918,267,799.98
  5. Step 5: Solve for x
    x = 6,918,267,799.98/86,538.60
  6. Step 6: Final answer
    x = 79,944.30

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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.