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Finding the Fourth Proportional to 86,718.60, 129,980.70 and 44,582.40

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Solution

The fourth proportional to 86,718.60, 129,980.70 and 44,582.40 is: 66,823.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,718.60 : 129,980.70 = 44,582.40 : x
  2. Step 2: Convert to fraction form
    86,718.60/129,980.70 = 44,582.40/x
  3. Step 3: Cross multiply
    86,718.60x = 129,980.70 × 44,582.40
  4. Step 4: Simplify right side
    86,718.60x = 5,794,851,559.68
  5. Step 5: Solve for x
    x = 5,794,851,559.68/86,718.60
  6. Step 6: Final answer
    x = 66,823.63

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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.