Home / 91,619.20-137,428.80-63,625.60

Finding the Fourth Proportional to 91,619.20, 137,428.80 and 63,625.60

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Solution

The fourth proportional to 91,619.20, 137,428.80 and 63,625.60 is: 95,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,619.20 : 137,428.80 = 63,625.60 : x
  2. Step 2: Convert to fraction form
    91,619.20/137,428.80 = 63,625.60/x
  3. Step 3: Cross multiply
    91,619.20x = 137,428.80 × 63,625.60
  4. Step 4: Simplify right side
    91,619.20x = 8,743,989,857.28
  5. Step 5: Solve for x
    x = 8,743,989,857.28/91,619.20
  6. Step 6: Final answer
    x = 95,438.40

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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.