Home / 139,742.81-192,835.35-79,314.68

Finding the Fourth Proportional to 139,742.81, 192,835.35 and 79,314.68

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Solution

The fourth proportional to 139,742.81, 192,835.35 and 79,314.68 is: 109,448.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,742.81 : 192,835.35 = 79,314.68 : x
  2. Step 2: Convert to fraction form
    139,742.81/192,835.35 = 79,314.68/x
  3. Step 3: Cross multiply
    139,742.81x = 192,835.35 × 79,314.68
  4. Step 4: Simplify right side
    139,742.81x = 15,294,674,077.94
  5. Step 5: Solve for x
    x = 15,294,674,077.94/139,742.81
  6. Step 6: Final answer
    x = 109,448.74

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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.