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Finding the Fourth Proportional to 71,309.67, 98,408.85 and 39,045.65

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Solution

The fourth proportional to 71,309.67, 98,408.85 and 39,045.65 is: 53,883.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,309.67 : 98,408.85 = 39,045.65 : x
  2. Step 2: Convert to fraction form
    71,309.67/98,408.85 = 39,045.65/x
  3. Step 3: Cross multiply
    71,309.67x = 98,408.85 × 39,045.65
  4. Step 4: Simplify right side
    71,309.67x = 3,842,436,985.35
  5. Step 5: Solve for x
    x = 3,842,436,985.35/71,309.67
  6. Step 6: Final answer
    x = 53,883.82

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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.