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Finding the Fourth Proportional to 142,848.80, 197,131.80 and 79,187.60

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Solution

The fourth proportional to 142,848.80, 197,131.80 and 79,187.60 is: 109,279.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,848.80 : 197,131.80 = 79,187.60 : x
  2. Step 2: Convert to fraction form
    142,848.80/197,131.80 = 79,187.60/x
  3. Step 3: Cross multiply
    142,848.80x = 197,131.80 × 79,187.60
  4. Step 4: Simplify right side
    142,848.80x = 15,610,394,125.68
  5. Step 5: Solve for x
    x = 15,610,394,125.68/142,848.80
  6. Step 6: Final answer
    x = 109,279.14

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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.