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Finding the Fourth Proportional to 142,794, 197,063.58 and 79,130.40

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Solution

The fourth proportional to 142,794, 197,063.58 and 79,130.40 is: 109,204.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,794 : 197,063.58 = 79,130.40 : x
  2. Step 2: Convert to fraction form
    142,794/197,063.58 = 79,130.40/x
  3. Step 3: Cross multiply
    142,794x = 197,063.58 × 79,130.40
  4. Step 4: Simplify right side
    142,794x = 15,593,719,910.83
  5. Step 5: Solve for x
    x = 15,593,719,910.83/142,794
  6. Step 6: Final answer
    x = 109,204.31

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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.