Home / 139,429.51-192,412.21-79,011.66

Finding the Fourth Proportional to 139,429.51, 192,412.21 and 79,011.66

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Solution

The fourth proportional to 139,429.51, 192,412.21 and 79,011.66 is: 109,035.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,429.51 : 192,412.21 = 79,011.66 : x
  2. Step 2: Convert to fraction form
    139,429.51/192,412.21 = 79,011.66/x
  3. Step 3: Cross multiply
    139,429.51x = 192,412.21 × 79,011.66
  4. Step 4: Simplify right side
    139,429.51x = 15,202,808,116.37
  5. Step 5: Solve for x
    x = 15,202,808,116.37/139,429.51
  6. Step 6: Final answer
    x = 109,035.80

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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.