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Finding the Fourth Proportional to 479,078.34, 718,767.38 and 142,120.76

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Solution

The fourth proportional to 479,078.34, 718,767.38 and 142,120.76 is: 213,225.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,078.34 : 718,767.38 = 142,120.76 : x
  2. Step 2: Convert to fraction form
    479,078.34/718,767.38 = 142,120.76/x
  3. Step 3: Cross multiply
    479,078.34x = 718,767.38 × 142,120.76
  4. Step 4: Simplify right side
    479,078.34x = 102,151,766,308.81
  5. Step 5: Solve for x
    x = 102,151,766,308.81/479,078.34
  6. Step 6: Final answer
    x = 213,225.60

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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.