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Finding the Fourth Proportional to 139,732.34, 192,824.58 and 76,070.36

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Solution

The fourth proportional to 139,732.34, 192,824.58 and 76,070.36 is: 104,973.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,732.34 : 192,824.58 = 76,070.36 : x
  2. Step 2: Convert to fraction form
    139,732.34/192,824.58 = 76,070.36/x
  3. Step 3: Cross multiply
    139,732.34x = 192,824.58 × 76,070.36
  4. Step 4: Simplify right side
    139,732.34x = 14,668,235,217.45
  5. Step 5: Solve for x
    x = 14,668,235,217.45/139,732.34
  6. Step 6: Final answer
    x = 104,973.80

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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.