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Finding the Fourth Proportional to 251,690.50, 347,332.98 and 138,510.82

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Solution

The fourth proportional to 251,690.50, 347,332.98 and 138,510.82 is: 191,144.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,690.50 : 347,332.98 = 138,510.82 : x
  2. Step 2: Convert to fraction form
    251,690.50/347,332.98 = 138,510.82/x
  3. Step 3: Cross multiply
    251,690.50x = 347,332.98 × 138,510.82
  4. Step 4: Simplify right side
    251,690.50x = 48,109,375,872.84
  5. Step 5: Solve for x
    x = 48,109,375,872.84/251,690.50
  6. Step 6: Final answer
    x = 191,144.98

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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.