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Finding the Fourth Proportional to 139,763.88, 192,864.40 and 79,335.76

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Solution

The fourth proportional to 139,763.88, 192,864.40 and 79,335.76 is: 109,477.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,763.88 : 192,864.40 = 79,335.76 : x
  2. Step 2: Convert to fraction form
    139,763.88/192,864.40 = 79,335.76/x
  3. Step 3: Cross multiply
    139,763.88x = 192,864.40 × 79,335.76
  4. Step 4: Simplify right side
    139,763.88x = 15,301,043,750.94
  5. Step 5: Solve for x
    x = 15,301,043,750.94/139,763.88
  6. Step 6: Final answer
    x = 109,477.81

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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.