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Finding the Fourth Proportional to 61,813.86, 85,278.99 and 40,328.88

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Solution

The fourth proportional to 61,813.86, 85,278.99 and 40,328.88 is: 55,638.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,813.86 : 85,278.99 = 40,328.88 : x
  2. Step 2: Convert to fraction form
    61,813.86/85,278.99 = 40,328.88/x
  3. Step 3: Cross multiply
    61,813.86x = 85,278.99 × 40,328.88
  4. Step 4: Simplify right side
    61,813.86x = 3,439,206,154.23
  5. Step 5: Solve for x
    x = 3,439,206,154.23/61,813.86
  6. Step 6: Final answer
    x = 55,638.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.