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Finding the Fourth Proportional to 205,062.80, 307,637.40 and 86,673.20

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Solution

The fourth proportional to 205,062.80, 307,637.40 and 86,673.20 is: 130,028.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,062.80 : 307,637.40 = 86,673.20 : x
  2. Step 2: Convert to fraction form
    205,062.80/307,637.40 = 86,673.20/x
  3. Step 3: Cross multiply
    205,062.80x = 307,637.40 × 86,673.20
  4. Step 4: Simplify right side
    205,062.80x = 26,663,917,897.68
  5. Step 5: Solve for x
    x = 26,663,917,897.68/205,062.80
  6. Step 6: Final answer
    x = 130,028.06

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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.