Home / 140,908.10-211,549.80-81,786.20

Finding the Fourth Proportional to 140,908.10, 211,549.80 and 81,786.20

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Solution

The fourth proportional to 140,908.10, 211,549.80 and 81,786.20 is: 122,788.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,908.10 : 211,549.80 = 81,786.20 : x
  2. Step 2: Convert to fraction form
    140,908.10/211,549.80 = 81,786.20/x
  3. Step 3: Cross multiply
    140,908.10x = 211,549.80 × 81,786.20
  4. Step 4: Simplify right side
    140,908.10x = 17,301,854,252.76
  5. Step 5: Solve for x
    x = 17,301,854,252.76/140,908.10
  6. Step 6: Final answer
    x = 122,788.22

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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.