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Finding the Fourth Proportional to 280,668.63, 420,719.21 and 120,848.79

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Solution

The fourth proportional to 280,668.63, 420,719.21 and 120,848.79 is: 181,151.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,668.63 : 420,719.21 = 120,848.79 : x
  2. Step 2: Convert to fraction form
    280,668.63/420,719.21 = 120,848.79/x
  3. Step 3: Cross multiply
    280,668.63x = 420,719.21 × 120,848.79
  4. Step 4: Simplify right side
    280,668.63x = 50,843,406,854.01
  5. Step 5: Solve for x
    x = 50,843,406,854.01/280,668.63
  6. Step 6: Final answer
    x = 181,151.01

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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.