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Finding the Fourth Proportional to 84,043.88, 115,980.18 and 45,805.64

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Solution

The fourth proportional to 84,043.88, 115,980.18 and 45,805.64 is: 63,211.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,043.88 : 115,980.18 = 45,805.64 : x
  2. Step 2: Convert to fraction form
    84,043.88/115,980.18 = 45,805.64/x
  3. Step 3: Cross multiply
    84,043.88x = 115,980.18 × 45,805.64
  4. Step 4: Simplify right side
    84,043.88x = 5,312,546,372.22
  5. Step 5: Solve for x
    x = 5,312,546,372.22/84,043.88
  6. Step 6: Final answer
    x = 63,211.58

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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.