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Finding the Fourth Proportional to 139,648.64, 192,708.32 and 79,224.88

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Solution

The fourth proportional to 139,648.64, 192,708.32 and 79,224.88 is: 109,326.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,648.64 : 192,708.32 = 79,224.88 : x
  2. Step 2: Convert to fraction form
    139,648.64/192,708.32 = 79,224.88/x
  3. Step 3: Cross multiply
    139,648.64x = 192,708.32 × 79,224.88
  4. Step 4: Simplify right side
    139,648.64x = 15,267,293,527.00
  5. Step 5: Solve for x
    x = 15,267,293,527.00/139,648.64
  6. Step 6: Final answer
    x = 109,326.47

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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.