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Finding the Fourth Proportional to 119,859.60, 179,839.80 and 64,390.80

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Solution

The fourth proportional to 119,859.60, 179,839.80 and 64,390.80 is: 96,613.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,859.60 : 179,839.80 = 64,390.80 : x
  2. Step 2: Convert to fraction form
    119,859.60/179,839.80 = 64,390.80/x
  3. Step 3: Cross multiply
    119,859.60x = 179,839.80 × 64,390.80
  4. Step 4: Simplify right side
    119,859.60x = 11,580,028,593.84
  5. Step 5: Solve for x
    x = 11,580,028,593.84/119,859.60
  6. Step 6: Final answer
    x = 96,613.28

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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.