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Finding the Fourth Proportional to 251,785.80, 347,463.50 and 138,608.55

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Solution

The fourth proportional to 251,785.80, 347,463.50 and 138,608.55 is: 191,279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,785.80 : 347,463.50 = 138,608.55 : x
  2. Step 2: Convert to fraction form
    251,785.80/347,463.50 = 138,608.55/x
  3. Step 3: Cross multiply
    251,785.80x = 347,463.50 × 138,608.55
  4. Step 4: Simplify right side
    251,785.80x = 48,161,411,219.88
  5. Step 5: Solve for x
    x = 48,161,411,219.88/251,785.80
  6. Step 6: Final answer
    x = 191,279.30

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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.