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Finding the Fourth Proportional to 210,992.20, 291,120.30 and 124,907.92

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Solution

The fourth proportional to 210,992.20, 291,120.30 and 124,907.92 is: 172,343.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,992.20 : 291,120.30 = 124,907.92 : x
  2. Step 2: Convert to fraction form
    210,992.20/291,120.30 = 124,907.92/x
  3. Step 3: Cross multiply
    210,992.20x = 291,120.30 × 124,907.92
  4. Step 4: Simplify right side
    210,992.20x = 36,363,231,142.78
  5. Step 5: Solve for x
    x = 36,363,231,142.78/210,992.20
  6. Step 6: Final answer
    x = 172,343.96

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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.