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Finding the Fourth Proportional to 71,455.34, 98,612.31 and 39,623.55

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Solution

The fourth proportional to 71,455.34, 98,612.31 and 39,623.55 is: 54,682.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,455.34 : 98,612.31 = 39,623.55 : x
  2. Step 2: Convert to fraction form
    71,455.34/98,612.31 = 39,623.55/x
  3. Step 3: Cross multiply
    71,455.34x = 98,612.31 × 39,623.55
  4. Step 4: Simplify right side
    71,455.34x = 3,907,369,597.78
  5. Step 5: Solve for x
    x = 3,907,369,597.78/71,455.34
  6. Step 6: Final answer
    x = 54,682.69

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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.