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Finding the Fourth Proportional to 135,480.72, 187,054.64 and 84,570.96

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Solution

The fourth proportional to 135,480.72, 187,054.64 and 84,570.96 is: 116,764.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,480.72 : 187,054.64 = 84,570.96 : x
  2. Step 2: Convert to fraction form
    135,480.72/187,054.64 = 84,570.96/x
  3. Step 3: Cross multiply
    135,480.72x = 187,054.64 × 84,570.96
  4. Step 4: Simplify right side
    135,480.72x = 15,819,390,477.25
  5. Step 5: Solve for x
    x = 15,819,390,477.25/135,480.72
  6. Step 6: Final answer
    x = 116,764.88

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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.