Home / 140,218.70-210,328.05-81,169.70

Finding the Fourth Proportional to 140,218.70, 210,328.05 and 81,169.70

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Solution

The fourth proportional to 140,218.70, 210,328.05 and 81,169.70 is: 121,754.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,218.70 : 210,328.05 = 81,169.70 : x
  2. Step 2: Convert to fraction form
    140,218.70/210,328.05 = 81,169.70/x
  3. Step 3: Cross multiply
    140,218.70x = 210,328.05 × 81,169.70
  4. Step 4: Simplify right side
    140,218.70x = 17,072,264,720.09
  5. Step 5: Solve for x
    x = 17,072,264,720.09/140,218.70
  6. Step 6: Final answer
    x = 121,754.55

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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.