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Finding the Fourth Proportional to 86,577.60, 129,866.40 and 49,611.20

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Solution

The fourth proportional to 86,577.60, 129,866.40 and 49,611.20 is: 74,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,577.60 : 129,866.40 = 49,611.20 : x
  2. Step 2: Convert to fraction form
    86,577.60/129,866.40 = 49,611.20/x
  3. Step 3: Cross multiply
    86,577.60x = 129,866.40 × 49,611.20
  4. Step 4: Simplify right side
    86,577.60x = 6,442,827,943.68
  5. Step 5: Solve for x
    x = 6,442,827,943.68/86,577.60
  6. Step 6: Final answer
    x = 74,416.80

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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.