Home / 78,749.34-118,139.22-25,455.66

Finding the Fourth Proportional to 78,749.34, 118,139.22 and 25,455.66

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Solution

The fourth proportional to 78,749.34, 118,139.22 and 25,455.66 is: 38,188.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,749.34 : 118,139.22 = 25,455.66 : x
  2. Step 2: Convert to fraction form
    78,749.34/118,139.22 = 25,455.66/x
  3. Step 3: Cross multiply
    78,749.34x = 118,139.22 × 25,455.66
  4. Step 4: Simplify right side
    78,749.34x = 3,007,311,816.99
  5. Step 5: Solve for x
    x = 3,007,311,816.99/78,749.34
  6. Step 6: Final answer
    x = 38,188.41

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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.