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Finding the Fourth Proportional to 139,304.55, 192,246.73 and 78,867.21

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Solution

The fourth proportional to 139,304.55, 192,246.73 and 78,867.21 is: 108,840.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,304.55 : 192,246.73 = 78,867.21 : x
  2. Step 2: Convert to fraction form
    139,304.55/192,246.73 = 78,867.21/x
  3. Step 3: Cross multiply
    139,304.55x = 192,246.73 × 78,867.21
  4. Step 4: Simplify right side
    139,304.55x = 15,161,963,226.72
  5. Step 5: Solve for x
    x = 15,161,963,226.72/139,304.55
  6. Step 6: Final answer
    x = 108,840.40

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1.5x scale

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.