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Finding the Fourth Proportional to 79,267.74, 109,390.02 and 43,458

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Solution

The fourth proportional to 79,267.74, 109,390.02 and 43,458 is: 59,972.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,267.74 : 109,390.02 = 43,458 : x
  2. Step 2: Convert to fraction form
    79,267.74/109,390.02 = 43,458/x
  3. Step 3: Cross multiply
    79,267.74x = 109,390.02 × 43,458
  4. Step 4: Simplify right side
    79,267.74x = 4,753,871,489.16
  5. Step 5: Solve for x
    x = 4,753,871,489.16/79,267.74
  6. Step 6: Final answer
    x = 59,972.34

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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.