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Finding the Fourth Proportional to 139,291.60, 192,221.80 and 75,628.88

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Solution

The fourth proportional to 139,291.60, 192,221.80 and 75,628.88 is: 104,367.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,291.60 : 192,221.80 = 75,628.88 : x
  2. Step 2: Convert to fraction form
    139,291.60/192,221.80 = 75,628.88/x
  3. Step 3: Cross multiply
    139,291.60x = 192,221.80 × 75,628.88
  4. Step 4: Simplify right side
    139,291.60x = 14,537,519,445.58
  5. Step 5: Solve for x
    x = 14,537,519,445.58/139,291.60
  6. Step 6: Final answer
    x = 104,367.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.