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Finding the Fourth Proportional to 139,628.88, 192,682.13 and 75,966.71

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Solution

The fourth proportional to 139,628.88, 192,682.13 and 75,966.71 is: 104,830.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,628.88 : 192,682.13 = 75,966.71 : x
  2. Step 2: Convert to fraction form
    139,628.88/192,682.13 = 75,966.71/x
  3. Step 3: Cross multiply
    139,628.88x = 192,682.13 × 75,966.71
  4. Step 4: Simplify right side
    139,628.88x = 14,637,426,148.65
  5. Step 5: Solve for x
    x = 14,637,426,148.65/139,628.88
  6. Step 6: Final answer
    x = 104,830.94

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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.