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Finding the Fourth Proportional to 86,440.80, 129,855.60 and 60,196.80

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Solution

The fourth proportional to 86,440.80, 129,855.60 and 60,196.80 is: 90,430.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,440.80 : 129,855.60 = 60,196.80 : x
  2. Step 2: Convert to fraction form
    86,440.80/129,855.60 = 60,196.80/x
  3. Step 3: Cross multiply
    86,440.80x = 129,855.60 × 60,196.80
  4. Step 4: Simplify right side
    86,440.80x = 7,816,891,582.08
  5. Step 5: Solve for x
    x = 7,816,891,582.08/86,440.80
  6. Step 6: Final answer
    x = 90,430.58

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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.