Home / 78,457.20-117,680.40-25,148.40

Finding the Fourth Proportional to 78,457.20, 117,680.40 and 25,148.40

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Solution

The fourth proportional to 78,457.20, 117,680.40 and 25,148.40 is: 37,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,457.20 : 117,680.40 = 25,148.40 : x
  2. Step 2: Convert to fraction form
    78,457.20/117,680.40 = 25,148.40/x
  3. Step 3: Cross multiply
    78,457.20x = 117,680.40 × 25,148.40
  4. Step 4: Simplify right side
    78,457.20x = 2,959,473,771.36
  5. Step 5: Solve for x
    x = 2,959,473,771.36/78,457.20
  6. Step 6: Final answer
    x = 37,720.87

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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.