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Finding the Fourth Proportional to 130,033.80, 194,661.90 and 77,416.20

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Solution

The fourth proportional to 130,033.80, 194,661.90 and 77,416.20 is: 115,892.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,033.80 : 194,661.90 = 77,416.20 : x
  2. Step 2: Convert to fraction form
    130,033.80/194,661.90 = 77,416.20/x
  3. Step 3: Cross multiply
    130,033.80x = 194,661.90 × 77,416.20
  4. Step 4: Simplify right side
    130,033.80x = 15,069,984,582.78
  5. Step 5: Solve for x
    x = 15,069,984,582.78/130,033.80
  6. Step 6: Final answer
    x = 115,892.83

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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.