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Finding the Fourth Proportional to 280,080.60, 420,120.90 and 102,605.55

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Solution

The fourth proportional to 280,080.60, 420,120.90 and 102,605.55 is: 153,908.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,080.60 : 420,120.90 = 102,605.55 : x
  2. Step 2: Convert to fraction form
    280,080.60/420,120.90 = 102,605.55/x
  3. Step 3: Cross multiply
    280,080.60x = 420,120.90 × 102,605.55
  4. Step 4: Simplify right side
    280,080.60x = 43,106,736,011.00
  5. Step 5: Solve for x
    x = 43,106,736,011.00/280,080.60
  6. Step 6: Final answer
    x = 153,908.33

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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.