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Finding the Fourth Proportional to 210,630.96, 290,670.71 and 115,138.04

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Solution

The fourth proportional to 210,630.96, 290,670.71 and 115,138.04 is: 158,890.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,630.96 : 290,670.71 = 115,138.04 : x
  2. Step 2: Convert to fraction form
    210,630.96/290,670.71 = 115,138.04/x
  3. Step 3: Cross multiply
    210,630.96x = 290,670.71 × 115,138.04
  4. Step 4: Simplify right side
    210,630.96x = 33,467,253,805.76
  5. Step 5: Solve for x
    x = 33,467,253,805.76/210,630.96
  6. Step 6: Final answer
    x = 158,890.48

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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.