Home / 138,559.11-191,195.32-78,126.15

Finding the Fourth Proportional to 138,559.11, 191,195.32 and 78,126.15

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Solution

The fourth proportional to 138,559.11, 191,195.32 and 78,126.15 is: 107,804.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,559.11 : 191,195.32 = 78,126.15 : x
  2. Step 2: Convert to fraction form
    138,559.11/191,195.32 = 78,126.15/x
  3. Step 3: Cross multiply
    138,559.11x = 191,195.32 × 78,126.15
  4. Step 4: Simplify right side
    138,559.11x = 14,937,353,858.99
  5. Step 5: Solve for x
    x = 14,937,353,858.99/138,559.11
  6. Step 6: Final answer
    x = 107,804.92

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1.5x scale

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.