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Finding the Fourth Proportional to 251,615.62, 347,234.85 and 138,438.58

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Solution

The fourth proportional to 251,615.62, 347,234.85 and 138,438.58 is: 191,048.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,615.62 : 347,234.85 = 138,438.58 : x
  2. Step 2: Convert to fraction form
    251,615.62/347,234.85 = 138,438.58/x
  3. Step 3: Cross multiply
    251,615.62x = 347,234.85 × 138,438.58
  4. Step 4: Simplify right side
    251,615.62x = 48,070,699,560.51
  5. Step 5: Solve for x
    x = 48,070,699,560.51/251,615.62
  6. Step 6: Final answer
    x = 191,048.15

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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.