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Finding the Fourth Proportional to 100,378.76, 150,305.10 and 70,635.56

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Solution

The fourth proportional to 100,378.76, 150,305.10 and 70,635.56 is: 105,768.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,378.76 : 150,305.10 = 70,635.56 : x
  2. Step 2: Convert to fraction form
    100,378.76/150,305.10 = 70,635.56/x
  3. Step 3: Cross multiply
    100,378.76x = 150,305.10 × 70,635.56
  4. Step 4: Simplify right side
    100,378.76x = 10,616,884,909.36
  5. Step 5: Solve for x
    x = 10,616,884,909.36/100,378.76
  6. Step 6: Final answer
    x = 105,768.24

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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.