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Finding the Fourth Proportional to 251,697.36, 347,342.16 and 138,520.20

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Solution

The fourth proportional to 251,697.36, 347,342.16 and 138,520.20 is: 191,157.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,697.36 : 347,342.16 = 138,520.20 : x
  2. Step 2: Convert to fraction form
    251,697.36/347,342.16 = 138,520.20/x
  3. Step 3: Cross multiply
    251,697.36x = 347,342.16 × 138,520.20
  4. Step 4: Simplify right side
    251,697.36x = 48,113,905,471.63
  5. Step 5: Solve for x
    x = 48,113,905,471.63/251,697.36
  6. Step 6: Final answer
    x = 191,157.77

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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.