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Finding the Fourth Proportional to 139,459.84, 192,411.84 and 79,020.88

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Solution

The fourth proportional to 139,459.84, 192,411.84 and 79,020.88 is: 109,024.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,459.84 : 192,411.84 = 79,020.88 : x
  2. Step 2: Convert to fraction form
    139,459.84/192,411.84 = 79,020.88/x
  3. Step 3: Cross multiply
    139,459.84x = 192,411.84 × 79,020.88
  4. Step 4: Simplify right side
    139,459.84x = 15,204,552,919.22
  5. Step 5: Solve for x
    x = 15,204,552,919.22/139,459.84
  6. Step 6: Final answer
    x = 109,024.60

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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.