Home / 100,725.75-138,973.32-64,936.71

Finding the Fourth Proportional to 100,725.75, 138,973.32 and 64,936.71

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Solution

The fourth proportional to 100,725.75, 138,973.32 and 64,936.71 is: 89,594.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,725.75 : 138,973.32 = 64,936.71 : x
  2. Step 2: Convert to fraction form
    100,725.75/138,973.32 = 64,936.71/x
  3. Step 3: Cross multiply
    100,725.75x = 138,973.32 × 64,936.71
  4. Step 4: Simplify right side
    100,725.75x = 9,024,470,178.58
  5. Step 5: Solve for x
    x = 9,024,470,178.58/100,725.75
  6. Step 6: Final answer
    x = 89,594.47

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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.