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Finding the Fourth Proportional to 99,261.44, 136,980.96 and 53,939

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Solution

The fourth proportional to 99,261.44, 136,980.96 and 53,939 is: 74,435.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,261.44 : 136,980.96 = 53,939 : x
  2. Step 2: Convert to fraction form
    99,261.44/136,980.96 = 53,939/x
  3. Step 3: Cross multiply
    99,261.44x = 136,980.96 × 53,939
  4. Step 4: Simplify right side
    99,261.44x = 7,388,616,001.44
  5. Step 5: Solve for x
    x = 7,388,616,001.44/99,261.44
  6. Step 6: Final answer
    x = 74,435.91

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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.