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Finding the Fourth Proportional to 111,087.88, 153,141.78 and 79,201.40

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Solution

The fourth proportional to 111,087.88, 153,141.78 and 79,201.40 is: 109,184.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,087.88 : 153,141.78 = 79,201.40 : x
  2. Step 2: Convert to fraction form
    111,087.88/153,141.78 = 79,201.40/x
  3. Step 3: Cross multiply
    111,087.88x = 153,141.78 × 79,201.40
  4. Step 4: Simplify right side
    111,087.88x = 12,129,043,374.49
  5. Step 5: Solve for x
    x = 12,129,043,374.49/111,087.88
  6. Step 6: Final answer
    x = 109,184.22

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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.