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Finding the Fourth Proportional to 97,419.20, 146,128.80 and 79,908.80

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Solution

The fourth proportional to 97,419.20, 146,128.80 and 79,908.80 is: 119,863.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,419.20 : 146,128.80 = 79,908.80 : x
  2. Step 2: Convert to fraction form
    97,419.20/146,128.80 = 79,908.80/x
  3. Step 3: Cross multiply
    97,419.20x = 146,128.80 × 79,908.80
  4. Step 4: Simplify right side
    97,419.20x = 11,676,977,053.44
  5. Step 5: Solve for x
    x = 11,676,977,053.44/97,419.20
  6. Step 6: Final answer
    x = 119,863.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.