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Finding the Fourth Proportional to 101,448.12, 139,998.30 and 56,736.12

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Solution

The fourth proportional to 101,448.12, 139,998.30 and 56,736.12 is: 78,295.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,448.12 : 139,998.30 = 56,736.12 : x
  2. Step 2: Convert to fraction form
    101,448.12/139,998.30 = 56,736.12/x
  3. Step 3: Cross multiply
    101,448.12x = 139,998.30 × 56,736.12
  4. Step 4: Simplify right side
    101,448.12x = 7,942,960,348.60
  5. Step 5: Solve for x
    x = 7,942,960,348.60/101,448.12
  6. Step 6: Final answer
    x = 78,295.79

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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.