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Finding the Fourth Proportional to 71,653.56, 98,881.20 and 39,821.91

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Solution

The fourth proportional to 71,653.56, 98,881.20 and 39,821.91 is: 54,953.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,653.56 : 98,881.20 = 39,821.91 : x
  2. Step 2: Convert to fraction form
    71,653.56/98,881.20 = 39,821.91/x
  3. Step 3: Cross multiply
    71,653.56x = 98,881.20 × 39,821.91
  4. Step 4: Simplify right side
    71,653.56x = 3,937,638,247.09
  5. Step 5: Solve for x
    x = 3,937,638,247.09/71,653.56
  6. Step 6: Final answer
    x = 54,953.84

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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.