Home / 78,156.32-117,044.40-36,615.20

Finding the Fourth Proportional to 78,156.32, 117,044.40 and 36,615.20

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Solution

The fourth proportional to 78,156.32, 117,044.40 and 36,615.20 is: 54,833.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,156.32 : 117,044.40 = 36,615.20 : x
  2. Step 2: Convert to fraction form
    78,156.32/117,044.40 = 36,615.20/x
  3. Step 3: Cross multiply
    78,156.32x = 117,044.40 × 36,615.20
  4. Step 4: Simplify right side
    78,156.32x = 4,285,604,114.88
  5. Step 5: Solve for x
    x = 4,285,604,114.88/78,156.32
  6. Step 6: Final answer
    x = 54,833.75

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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.