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Finding the Fourth Proportional to 99,910.53, 149,939.70 and 47,320.11

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Solution

The fourth proportional to 99,910.53, 149,939.70 and 47,320.11 is: 71,015.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,910.53 : 149,939.70 = 47,320.11 : x
  2. Step 2: Convert to fraction form
    99,910.53/149,939.70 = 47,320.11/x
  3. Step 3: Cross multiply
    99,910.53x = 149,939.70 × 47,320.11
  4. Step 4: Simplify right side
    99,910.53x = 7,095,163,097.37
  5. Step 5: Solve for x
    x = 7,095,163,097.37/99,910.53
  6. Step 6: Final answer
    x = 71,015.17

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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.