Home / 287,712,011.20-431,568,016.80-164,890,091.20

Finding the Fourth Proportional to 287,712,011.20, 431,568,016.80 and 164,890,091.20

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Solution

The fourth proportional to 287,712,011.20, 431,568,016.80 and 164,890,091.20 is: 247,335,136.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,011.20 : 431,568,016.80 = 164,890,091.20 : x
  2. Step 2: Convert to fraction form
    287,712,011.20/431,568,016.80 = 164,890,091.20/x
  3. Step 3: Cross multiply
    287,712,011.20x = 431,568,016.80 × 164,890,091.20
  4. Step 4: Simplify right side
    287,712,011.20x = 71,161,289,649,155,128
  5. Step 5: Solve for x
    x = 71,161,289,649,155,128/287,712,011.20
  6. Step 6: Final answer
    x = 247,335,136.80

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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.