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Finding the Fourth Proportional to 85,507.98, 128,261.97 and 23,178.48

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Solution

The fourth proportional to 85,507.98, 128,261.97 and 23,178.48 is: 34,767.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,507.98 : 128,261.97 = 23,178.48 : x
  2. Step 2: Convert to fraction form
    85,507.98/128,261.97 = 23,178.48/x
  3. Step 3: Cross multiply
    85,507.98x = 128,261.97 × 23,178.48
  4. Step 4: Simplify right side
    85,507.98x = 2,972,917,506.41
  5. Step 5: Solve for x
    x = 2,972,917,506.41/85,507.98
  6. Step 6: Final answer
    x = 34,767.72

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.