Home / 81,124.86-121,522.04-66,185.22

Finding the Fourth Proportional to 81,124.86, 121,522.04 and 66,185.22

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Solution

The fourth proportional to 81,124.86, 121,522.04 and 66,185.22 is: 99,143.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,124.86 : 121,522.04 = 66,185.22 : x
  2. Step 2: Convert to fraction form
    81,124.86/121,522.04 = 66,185.22/x
  3. Step 3: Cross multiply
    81,124.86x = 121,522.04 × 66,185.22
  4. Step 4: Simplify right side
    81,124.86x = 8,042,962,952.25
  5. Step 5: Solve for x
    x = 8,042,962,952.25/81,124.86
  6. Step 6: Final answer
    x = 99,143.01

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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.