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Finding the Fourth Proportional to 139,763.40, 192,917.01 and 79,374.25

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Solution

The fourth proportional to 139,763.40, 192,917.01 and 79,374.25 is: 109,561.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,763.40 : 192,917.01 = 79,374.25 : x
  2. Step 2: Convert to fraction form
    139,763.40/192,917.01 = 79,374.25/x
  3. Step 3: Cross multiply
    139,763.40x = 192,917.01 × 79,374.25
  4. Step 4: Simplify right side
    139,763.40x = 15,312,642,980.99
  5. Step 5: Solve for x
    x = 15,312,642,980.99/139,763.40
  6. Step 6: Final answer
    x = 109,561.18

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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.