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Finding the Fourth Proportional to 203,642.88, 305,341.56 and 91,302.78

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Solution

The fourth proportional to 203,642.88, 305,341.56 and 91,302.78 is: 136,899.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,642.88 : 305,341.56 = 91,302.78 : x
  2. Step 2: Convert to fraction form
    203,642.88/305,341.56 = 91,302.78/x
  3. Step 3: Cross multiply
    203,642.88x = 305,341.56 × 91,302.78
  4. Step 4: Simplify right side
    203,642.88x = 27,878,533,277.54
  5. Step 5: Solve for x
    x = 27,878,533,277.54/203,642.88
  6. Step 6: Final answer
    x = 136,899.13

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1.5x scale

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.