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Finding the Fourth Proportional to 61,909.30, 92,858.55 and 20,356.30

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Solution

The fourth proportional to 61,909.30, 92,858.55 and 20,356.30 is: 30,532.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,909.30 : 92,858.55 = 20,356.30 : x
  2. Step 2: Convert to fraction form
    61,909.30/92,858.55 = 20,356.30/x
  3. Step 3: Cross multiply
    61,909.30x = 92,858.55 × 20,356.30
  4. Step 4: Simplify right side
    61,909.30x = 1,890,256,501.37
  5. Step 5: Solve for x
    x = 1,890,256,501.37/61,909.30
  6. Step 6: Final answer
    x = 30,532.67

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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.