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Finding the Fourth Proportional to 139,152, 192,030.12 and 75,489.79

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Solution

The fourth proportional to 139,152, 192,030.12 and 75,489.79 is: 104,176.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,152 : 192,030.12 = 75,489.79 : x
  2. Step 2: Convert to fraction form
    139,152/192,030.12 = 75,489.79/x
  3. Step 3: Cross multiply
    139,152x = 192,030.12 × 75,489.79
  4. Step 4: Simplify right side
    139,152x = 14,496,313,432.47
  5. Step 5: Solve for x
    x = 14,496,313,432.47/139,152
  6. Step 6: Final answer
    x = 104,176.11

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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.