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Finding the Fourth Proportional to 203,642.84, 305,341.54 and 91,302.72

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Solution

The fourth proportional to 203,642.84, 305,341.54 and 91,302.72 is: 136,899.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,642.84 : 305,341.54 = 91,302.72 : x
  2. Step 2: Convert to fraction form
    203,642.84/305,341.54 = 91,302.72/x
  3. Step 3: Cross multiply
    203,642.84x = 305,341.54 × 91,302.72
  4. Step 4: Simplify right side
    203,642.84x = 27,878,513,130.99
  5. Step 5: Solve for x
    x = 27,878,513,130.99/203,642.84
  6. Step 6: Final answer
    x = 136,899.06

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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.