Home / 151,115.54-208,532.87-83,128.20

Finding the Fourth Proportional to 151,115.54, 208,532.87 and 83,128.20

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Solution

The fourth proportional to 151,115.54, 208,532.87 and 83,128.20 is: 114,713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,115.54 : 208,532.87 = 83,128.20 : x
  2. Step 2: Convert to fraction form
    151,115.54/208,532.87 = 83,128.20/x
  3. Step 3: Cross multiply
    151,115.54x = 208,532.87 × 83,128.20
  4. Step 4: Simplify right side
    151,115.54x = 17,334,961,708.29
  5. Step 5: Solve for x
    x = 17,334,961,708.29/151,115.54
  6. Step 6: Final answer
    x = 114,713.30

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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.