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Finding the Fourth Proportional to 319,809.60, 479,630.78 and 95,109.52

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Solution

The fourth proportional to 319,809.60, 479,630.78 and 95,109.52 is: 142,639.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,809.60 : 479,630.78 = 95,109.52 : x
  2. Step 2: Convert to fraction form
    319,809.60/479,630.78 = 95,109.52/x
  3. Step 3: Cross multiply
    319,809.60x = 479,630.78 × 95,109.52
  4. Step 4: Simplify right side
    319,809.60x = 45,617,453,263.03
  5. Step 5: Solve for x
    x = 45,617,453,263.03/319,809.60
  6. Step 6: Final answer
    x = 142,639.41

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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.