Home / 139,938.41-193,115.05-79,509.13

Finding the Fourth Proportional to 139,938.41, 193,115.05 and 79,509.13

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Solution

The fourth proportional to 139,938.41, 193,115.05 and 79,509.13 is: 109,722.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,938.41 : 193,115.05 = 79,509.13 : x
  2. Step 2: Convert to fraction form
    139,938.41/193,115.05 = 79,509.13/x
  3. Step 3: Cross multiply
    139,938.41x = 193,115.05 × 79,509.13
  4. Step 4: Simplify right side
    139,938.41x = 15,354,409,615.41
  5. Step 5: Solve for x
    x = 15,354,409,615.41/139,938.41
  6. Step 6: Final answer
    x = 109,722.62

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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.