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Finding the Fourth Proportional to 84,989.34, 117,319.86 and 54,776.34

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Solution

The fourth proportional to 84,989.34, 117,319.86 and 54,776.34 is: 75,613.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,989.34 : 117,319.86 = 54,776.34 : x
  2. Step 2: Convert to fraction form
    84,989.34/117,319.86 = 54,776.34/x
  3. Step 3: Cross multiply
    84,989.34x = 117,319.86 × 54,776.34
  4. Step 4: Simplify right side
    84,989.34x = 6,426,352,540.11
  5. Step 5: Solve for x
    x = 6,426,352,540.11/84,989.34
  6. Step 6: Final answer
    x = 75,613.63

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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.