Home / 287,712,007.20-431,568,010.80-164,890,087.20

Finding the Fourth Proportional to 287,712,007.20, 431,568,010.80 and 164,890,087.20

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Solution

The fourth proportional to 287,712,007.20, 431,568,010.80 and 164,890,087.20 is: 247,335,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,007.20 : 431,568,010.80 = 164,890,087.20 : x
  2. Step 2: Convert to fraction form
    287,712,007.20/431,568,010.80 = 164,890,087.20/x
  3. Step 3: Cross multiply
    287,712,007.20x = 431,568,010.80 × 164,890,087.20
  4. Step 4: Simplify right side
    287,712,007.20x = 71,161,286,933,542,536
  5. Step 5: Solve for x
    x = 71,161,286,933,542,536/287,712,007.20
  6. Step 6: Final answer
    x = 247,335,130.80

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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.