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Finding the Fourth Proportional to 139,360.79, 192,313.49 and 78,937.02

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Solution

The fourth proportional to 139,360.79, 192,313.49 and 78,937.02 is: 108,930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,360.79 : 192,313.49 = 78,937.02 : x
  2. Step 2: Convert to fraction form
    139,360.79/192,313.49 = 78,937.02/x
  3. Step 3: Cross multiply
    139,360.79x = 192,313.49 × 78,937.02
  4. Step 4: Simplify right side
    139,360.79x = 15,180,653,411.71
  5. Step 5: Solve for x
    x = 15,180,653,411.71/139,360.79
  6. Step 6: Final answer
    x = 108,930.60

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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.