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Finding the Fourth Proportional to 235,881.78, 325,507.02 and 128,451.54

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Solution

The fourth proportional to 235,881.78, 325,507.02 and 128,451.54 is: 177,257.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,881.78 : 325,507.02 = 128,451.54 : x
  2. Step 2: Convert to fraction form
    235,881.78/325,507.02 = 128,451.54/x
  3. Step 3: Cross multiply
    235,881.78x = 325,507.02 × 128,451.54
  4. Step 4: Simplify right side
    235,881.78x = 41,811,877,999.81
  5. Step 5: Solve for x
    x = 41,811,877,999.81/235,881.78
  6. Step 6: Final answer
    x = 177,257.77

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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.