Home / 78,131.28-117,131.10-63,303.42

Finding the Fourth Proportional to 78,131.28, 117,131.10 and 63,303.42

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Solution

The fourth proportional to 78,131.28, 117,131.10 and 63,303.42 is: 94,901.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,131.28 : 117,131.10 = 63,303.42 : x
  2. Step 2: Convert to fraction form
    78,131.28/117,131.10 = 63,303.42/x
  3. Step 3: Cross multiply
    78,131.28x = 117,131.10 × 63,303.42
  4. Step 4: Simplify right side
    78,131.28x = 7,414,799,218.36
  5. Step 5: Solve for x
    x = 7,414,799,218.36/78,131.28
  6. Step 6: Final answer
    x = 94,901.80

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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.