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Finding the Fourth Proportional to 50,721, 70,000.21 and 29,211.45

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Solution

The fourth proportional to 50,721, 70,000.21 and 29,211.45 is: 40,314.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,721 : 70,000.21 = 29,211.45 : x
  2. Step 2: Convert to fraction form
    50,721/70,000.21 = 29,211.45/x
  3. Step 3: Cross multiply
    50,721x = 70,000.21 × 29,211.45
  4. Step 4: Simplify right side
    50,721x = 2,044,807,634.40
  5. Step 5: Solve for x
    x = 2,044,807,634.40/50,721
  6. Step 6: Final answer
    x = 40,314.81

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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.