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Finding the Fourth Proportional to 251,466.15, 347,016.36 and 138,288.90

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Solution

The fourth proportional to 251,466.15, 347,016.36 and 138,288.90 is: 190,834.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,466.15 : 347,016.36 = 138,288.90 : x
  2. Step 2: Convert to fraction form
    251,466.15/347,016.36 = 138,288.90/x
  3. Step 3: Cross multiply
    251,466.15x = 347,016.36 × 138,288.90
  4. Step 4: Simplify right side
    251,466.15x = 47,988,510,706.40
  5. Step 5: Solve for x
    x = 47,988,510,706.40/251,466.15
  6. Step 6: Final answer
    x = 190,834.87

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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.