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Finding the Fourth Proportional to 100,503.15, 150,754.54 and 78,333.15

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Solution

The fourth proportional to 100,503.15, 150,754.54 and 78,333.15 is: 117,499.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,503.15 : 150,754.54 = 78,333.15 : x
  2. Step 2: Convert to fraction form
    100,503.15/150,754.54 = 78,333.15/x
  3. Step 3: Cross multiply
    100,503.15x = 150,754.54 × 78,333.15
  4. Step 4: Simplify right side
    100,503.15x = 11,809,077,995.00
  5. Step 5: Solve for x
    x = 11,809,077,995.00/100,503.15
  6. Step 6: Final answer
    x = 117,499.58

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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.