Home / 81,264.90-121,786.62-49,686

Finding the Fourth Proportional to 81,264.90, 121,786.62 and 49,686

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Solution

The fourth proportional to 81,264.90, 121,786.62 and 49,686 is: 74,461.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,264.90 : 121,786.62 = 49,686 : x
  2. Step 2: Convert to fraction form
    81,264.90/121,786.62 = 49,686/x
  3. Step 3: Cross multiply
    81,264.90x = 121,786.62 × 49,686
  4. Step 4: Simplify right side
    81,264.90x = 6,051,090,001.32
  5. Step 5: Solve for x
    x = 6,051,090,001.32/81,264.90
  6. Step 6: Final answer
    x = 74,461.30

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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.