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Finding the Fourth Proportional to 71,315.65, 98,310.76 and 54,290.22

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Solution

The fourth proportional to 71,315.65, 98,310.76 and 54,290.22 is: 74,840.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,315.65 : 98,310.76 = 54,290.22 : x
  2. Step 2: Convert to fraction form
    71,315.65/98,310.76 = 54,290.22/x
  3. Step 3: Cross multiply
    71,315.65x = 98,310.76 × 54,290.22
  4. Step 4: Simplify right side
    71,315.65x = 5,337,312,788.77
  5. Step 5: Solve for x
    x = 5,337,312,788.77/71,315.65
  6. Step 6: Final answer
    x = 74,840.69

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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.