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Finding the Fourth Proportional to 259,637.60, 389,456.40 and 101,871.20

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Solution

The fourth proportional to 259,637.60, 389,456.40 and 101,871.20 is: 152,806.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,637.60 : 389,456.40 = 101,871.20 : x
  2. Step 2: Convert to fraction form
    259,637.60/389,456.40 = 101,871.20/x
  3. Step 3: Cross multiply
    259,637.60x = 389,456.40 × 101,871.20
  4. Step 4: Simplify right side
    259,637.60x = 39,674,390,815.68
  5. Step 5: Solve for x
    x = 39,674,390,815.68/259,637.60
  6. Step 6: Final answer
    x = 152,806.80

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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.