Home / 144,783.12-199,798.20-81,120.72

Finding the Fourth Proportional to 144,783.12, 199,798.20 and 81,120.72

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Solution

The fourth proportional to 144,783.12, 199,798.20 and 81,120.72 is: 111,945.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,783.12 : 199,798.20 = 81,120.72 : x
  2. Step 2: Convert to fraction form
    144,783.12/199,798.20 = 81,120.72/x
  3. Step 3: Cross multiply
    144,783.12x = 199,798.20 × 81,120.72
  4. Step 4: Simplify right side
    144,783.12x = 16,207,773,838.70
  5. Step 5: Solve for x
    x = 16,207,773,838.70/144,783.12
  6. Step 6: Final answer
    x = 111,945.19

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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.