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Finding the Fourth Proportional to 210,672.26, 290,730.56 and 115,178.72

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Solution

The fourth proportional to 210,672.26, 290,730.56 and 115,178.72 is: 158,948.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,672.26 : 290,730.56 = 115,178.72 : x
  2. Step 2: Convert to fraction form
    210,672.26/290,730.56 = 115,178.72/x
  3. Step 3: Cross multiply
    210,672.26x = 290,730.56 × 115,178.72
  4. Step 4: Simplify right side
    210,672.26x = 33,485,973,765.68
  5. Step 5: Solve for x
    x = 33,485,973,765.68/210,672.26
  6. Step 6: Final answer
    x = 158,948.19

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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.