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Finding the Fourth Proportional to 79,130.97, 109,203.35 and 43,320.87

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Solution

The fourth proportional to 79,130.97, 109,203.35 and 43,320.87 is: 59,784.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,130.97 : 109,203.35 = 43,320.87 : x
  2. Step 2: Convert to fraction form
    79,130.97/109,203.35 = 43,320.87/x
  3. Step 3: Cross multiply
    79,130.97x = 109,203.35 × 43,320.87
  4. Step 4: Simplify right side
    79,130.97x = 4,730,783,912.31
  5. Step 5: Solve for x
    x = 4,730,783,912.31/79,130.97
  6. Step 6: Final answer
    x = 59,784.23

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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.