Home / 149,166.12-205,853.04-81,186.78

Finding the Fourth Proportional to 149,166.12, 205,853.04 and 81,186.78

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Solution

The fourth proportional to 149,166.12, 205,853.04 and 81,186.78 is: 112,039.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,166.12 : 205,853.04 = 81,186.78 : x
  2. Step 2: Convert to fraction form
    149,166.12/205,853.04 = 81,186.78/x
  3. Step 3: Cross multiply
    149,166.12x = 205,853.04 × 81,186.78
  4. Step 4: Simplify right side
    149,166.12x = 16,712,545,470.81
  5. Step 5: Solve for x
    x = 16,712,545,470.81/149,166.12
  6. Step 6: Final answer
    x = 112,039.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.