Home / 100,938.40-151,240.74-71,305.36

Finding the Fourth Proportional to 100,938.40, 151,240.74 and 71,305.36

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Solution

The fourth proportional to 100,938.40, 151,240.74 and 71,305.36 is: 106,840.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,938.40 : 151,240.74 = 71,305.36 : x
  2. Step 2: Convert to fraction form
    100,938.40/151,240.74 = 71,305.36/x
  3. Step 3: Cross multiply
    100,938.40x = 151,240.74 × 71,305.36
  4. Step 4: Simplify right side
    100,938.40x = 10,784,275,412.37
  5. Step 5: Solve for x
    x = 10,784,275,412.37/100,938.40
  6. Step 6: Final answer
    x = 106,840.17

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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.