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Finding the Fourth Proportional to 100,037.32, 149,889.37 and 70,392.87

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Solution

The fourth proportional to 100,037.32, 149,889.37 and 70,392.87 is: 105,472.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,037.32 : 149,889.37 = 70,392.87 : x
  2. Step 2: Convert to fraction form
    100,037.32/149,889.37 = 70,392.87/x
  3. Step 3: Cross multiply
    100,037.32x = 149,889.37 × 70,392.87
  4. Step 4: Simplify right side
    100,037.32x = 10,551,142,936.79
  5. Step 5: Solve for x
    x = 10,551,142,936.79/100,037.32
  6. Step 6: Final answer
    x = 105,472.07

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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.