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Finding the Fourth Proportional to 58,298.40, 87,469.20 and 56,138.40

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Solution

The fourth proportional to 58,298.40, 87,469.20 and 56,138.40 is: 84,228.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,298.40 : 87,469.20 = 56,138.40 : x
  2. Step 2: Convert to fraction form
    58,298.40/87,469.20 = 56,138.40/x
  3. Step 3: Cross multiply
    58,298.40x = 87,469.20 × 56,138.40
  4. Step 4: Simplify right side
    58,298.40x = 4,910,380,937.28
  5. Step 5: Solve for x
    x = 4,910,380,937.28/58,298.40
  6. Step 6: Final answer
    x = 84,228.40

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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.