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Finding the Fourth Proportional to 142,903.45, 197,203.84 and 79,239.88

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Solution

The fourth proportional to 142,903.45, 197,203.84 and 79,239.88 is: 109,349.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,903.45 : 197,203.84 = 79,239.88 : x
  2. Step 2: Convert to fraction form
    142,903.45/197,203.84 = 79,239.88/x
  3. Step 3: Cross multiply
    142,903.45x = 197,203.84 × 79,239.88
  4. Step 4: Simplify right side
    142,903.45x = 15,626,408,617.14
  5. Step 5: Solve for x
    x = 15,626,408,617.14/142,903.45
  6. Step 6: Final answer
    x = 109,349.41

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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.