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Finding the Fourth Proportional to 190,898.40, 286,261.20 and 85,663.20

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Solution

The fourth proportional to 190,898.40, 286,261.20 and 85,663.20 is: 128,456.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,898.40 : 286,261.20 = 85,663.20 : x
  2. Step 2: Convert to fraction form
    190,898.40/286,261.20 = 85,663.20/x
  3. Step 3: Cross multiply
    190,898.40x = 286,261.20 × 85,663.20
  4. Step 4: Simplify right side
    190,898.40x = 24,522,050,427.84
  5. Step 5: Solve for x
    x = 24,522,050,427.84/190,898.40
  6. Step 6: Final answer
    x = 128,456.03

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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.