Home / 287,712,010.20-431,568,015.30-164,890,090.20

Finding the Fourth Proportional to 287,712,010.20, 431,568,015.30 and 164,890,090.20

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Solution

The fourth proportional to 287,712,010.20, 431,568,015.30 and 164,890,090.20 is: 247,335,135.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,010.20 : 431,568,015.30 = 164,890,090.20 : x
  2. Step 2: Convert to fraction form
    287,712,010.20/431,568,015.30 = 164,890,090.20/x
  3. Step 3: Cross multiply
    287,712,010.20x = 431,568,015.30 × 164,890,090.20
  4. Step 4: Simplify right side
    287,712,010.20x = 71,161,288,970,251,976
  5. Step 5: Solve for x
    x = 71,161,288,970,251,976/287,712,010.20
  6. Step 6: Final answer
    x = 247,335,135.30

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1.5x scale

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.