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Finding the Fourth Proportional to 236,838.78, 326,827.80 and 129,412.50

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Solution

The fourth proportional to 236,838.78, 326,827.80 and 129,412.50 is: 178,583.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,838.78 : 326,827.80 = 129,412.50 : x
  2. Step 2: Convert to fraction form
    236,838.78/326,827.80 = 129,412.50/x
  3. Step 3: Cross multiply
    236,838.78x = 326,827.80 × 129,412.50
  4. Step 4: Simplify right side
    236,838.78x = 42,295,602,667.50
  5. Step 5: Solve for x
    x = 42,295,602,667.50/236,838.78
  6. Step 6: Final answer
    x = 178,583.94

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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.