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Finding the Fourth Proportional to 210,654.30, 290,706.39 and 125,778.78

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Solution

The fourth proportional to 210,654.30, 290,706.39 and 125,778.78 is: 173,576.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,654.30 : 290,706.39 = 125,778.78 : x
  2. Step 2: Convert to fraction form
    210,654.30/290,706.39 = 125,778.78/x
  3. Step 3: Cross multiply
    210,654.30x = 290,706.39 × 125,778.78
  4. Step 4: Simplify right side
    210,654.30x = 36,564,695,072.40
  5. Step 5: Solve for x
    x = 36,564,695,072.40/210,654.30
  6. Step 6: Final answer
    x = 173,576.78

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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.