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Finding the Fourth Proportional to 190,336.92, 285,507.40 and 77,988.30

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Solution

The fourth proportional to 190,336.92, 285,507.40 and 77,988.30 is: 116,983.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,336.92 : 285,507.40 = 77,988.30 : x
  2. Step 2: Convert to fraction form
    190,336.92/285,507.40 = 77,988.30/x
  3. Step 3: Cross multiply
    190,336.92x = 285,507.40 × 77,988.30
  4. Step 4: Simplify right side
    190,336.92x = 22,266,236,763.42
  5. Step 5: Solve for x
    x = 22,266,236,763.42/190,336.92
  6. Step 6: Final answer
    x = 116,983.28

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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.