Home / 163,372,721.45-245,131,449.36-85,631,149.78

Finding the Fourth Proportional to 163,372,721.45, 245,131,449.36 and 85,631,149.78

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Solution

The fourth proportional to 163,372,721.45, 245,131,449.36 and 85,631,149.78 is: 128,484,655.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,372,721.45 : 245,131,449.36 = 85,631,149.78 : x
  2. Step 2: Convert to fraction form
    163,372,721.45/245,131,449.36 = 85,631,149.78/x
  3. Step 3: Cross multiply
    163,372,721.45x = 245,131,449.36 × 85,631,149.78
  4. Step 4: Simplify right side
    163,372,721.45x = 20,990,887,856,413,472
  5. Step 5: Solve for x
    x = 20,990,887,856,413,472/163,372,721.45
  6. Step 6: Final answer
    x = 128,484,655.64

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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.