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Finding the Fourth Proportional to 139,485.95, 192,491.24 and 75,823.59

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Solution

The fourth proportional to 139,485.95, 192,491.24 and 75,823.59 is: 104,636.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,485.95 : 192,491.24 = 75,823.59 : x
  2. Step 2: Convert to fraction form
    139,485.95/192,491.24 = 75,823.59/x
  3. Step 3: Cross multiply
    139,485.95x = 192,491.24 × 75,823.59
  4. Step 4: Simplify right side
    139,485.95x = 14,595,377,203.08
  5. Step 5: Solve for x
    x = 14,595,377,203.08/139,485.95
  6. Step 6: Final answer
    x = 104,636.90

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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.