Home / 115,756.64-173,516.56-78,320.67

Finding the Fourth Proportional to 115,756.64, 173,516.56 and 78,320.67

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Solution

The fourth proportional to 115,756.64, 173,516.56 and 78,320.67 is: 117,400.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,756.64 : 173,516.56 = 78,320.67 : x
  2. Step 2: Convert to fraction form
    115,756.64/173,516.56 = 78,320.67/x
  3. Step 3: Cross multiply
    115,756.64x = 173,516.56 × 78,320.67
  4. Step 4: Simplify right side
    115,756.64x = 13,589,932,388.81
  5. Step 5: Solve for x
    x = 13,589,932,388.81/115,756.64
  6. Step 6: Final answer
    x = 117,400.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.