Home / 151,028.20-208,455.78-91,431.40

Finding the Fourth Proportional to 151,028.20, 208,455.78 and 91,431.40

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Solution

The fourth proportional to 151,028.20, 208,455.78 and 91,431.40 is: 126,197.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,028.20 : 208,455.78 = 91,431.40 : x
  2. Step 2: Convert to fraction form
    151,028.20/208,455.78 = 91,431.40/x
  3. Step 3: Cross multiply
    151,028.20x = 208,455.78 × 91,431.40
  4. Step 4: Simplify right side
    151,028.20x = 19,059,403,803.49
  5. Step 5: Solve for x
    x = 19,059,403,803.49/151,028.20
  6. Step 6: Final answer
    x = 126,197.65

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1.5x scale

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.