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Finding the Fourth Proportional to 251,520, 347,107.20 and 138,340.32

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Solution

The fourth proportional to 251,520, 347,107.20 and 138,340.32 is: 190,914.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,520 : 347,107.20 = 138,340.32 : x
  2. Step 2: Convert to fraction form
    251,520/347,107.20 = 138,340.32/x
  3. Step 3: Cross multiply
    251,520x = 347,107.20 × 138,340.32
  4. Step 4: Simplify right side
    251,520x = 48,018,921,122.30
  5. Step 5: Solve for x
    x = 48,018,921,122.30/251,520
  6. Step 6: Final answer
    x = 190,914.92

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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.