Home / 78,131.10-117,203.58-21,971.70

Finding the Fourth Proportional to 78,131.10, 117,203.58 and 21,971.70

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Solution

The fourth proportional to 78,131.10, 117,203.58 and 21,971.70 is: 32,959.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,131.10 : 117,203.58 = 21,971.70 : x
  2. Step 2: Convert to fraction form
    78,131.10/117,203.58 = 21,971.70/x
  3. Step 3: Cross multiply
    78,131.10x = 117,203.58 × 21,971.70
  4. Step 4: Simplify right side
    78,131.10x = 2,575,161,898.69
  5. Step 5: Solve for x
    x = 2,575,161,898.69/78,131.10
  6. Step 6: Final answer
    x = 32,959.50

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1.5x scale

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.