Home / 78,720.28-118,106.34-31,960.60

Finding the Fourth Proportional to 78,720.28, 118,106.34 and 31,960.60

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Solution

The fourth proportional to 78,720.28, 118,106.34 and 31,960.60 is: 47,951.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,720.28 : 118,106.34 = 31,960.60 : x
  2. Step 2: Convert to fraction form
    78,720.28/118,106.34 = 31,960.60/x
  3. Step 3: Cross multiply
    78,720.28x = 118,106.34 × 31,960.60
  4. Step 4: Simplify right side
    78,720.28x = 3,774,749,490.20
  5. Step 5: Solve for x
    x = 3,774,749,490.20/78,720.28
  6. Step 6: Final answer
    x = 47,951.42

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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.