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Finding the Fourth Proportional to 139,990.98, 210,073.54 and 56,884.98

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Solution

The fourth proportional to 139,990.98, 210,073.54 and 56,884.98 is: 85,362.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,990.98 : 210,073.54 = 56,884.98 : x
  2. Step 2: Convert to fraction form
    139,990.98/210,073.54 = 56,884.98/x
  3. Step 3: Cross multiply
    139,990.98x = 210,073.54 × 56,884.98
  4. Step 4: Simplify right side
    139,990.98x = 11,950,029,121.43
  5. Step 5: Solve for x
    x = 11,950,029,121.43/139,990.98
  6. Step 6: Final answer
    x = 85,362.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.