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Finding the Fourth Proportional to 102,629.80, 154,059.90 and 79,359.40

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Solution

The fourth proportional to 102,629.80, 154,059.90 and 79,359.40 is: 119,128.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,629.80 : 154,059.90 = 79,359.40 : x
  2. Step 2: Convert to fraction form
    102,629.80/154,059.90 = 79,359.40/x
  3. Step 3: Cross multiply
    102,629.80x = 154,059.90 × 79,359.40
  4. Step 4: Simplify right side
    102,629.80x = 12,226,101,228.06
  5. Step 5: Solve for x
    x = 12,226,101,228.06/102,629.80
  6. Step 6: Final answer
    x = 119,128.18

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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.