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Finding the Fourth Proportional to 168,911,797.20, 253,048,831.20 and 86,751,018.60

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Solution

The fourth proportional to 168,911,797.20, 253,048,831.20 and 86,751,018.60 is: 129,962,762.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,911,797.20 : 253,048,831.20 = 86,751,018.60 : x
  2. Step 2: Convert to fraction form
    168,911,797.20/253,048,831.20 = 86,751,018.60/x
  3. Step 3: Cross multiply
    168,911,797.20x = 253,048,831.20 × 86,751,018.60
  4. Step 4: Simplify right side
    168,911,797.20x = 21,952,243,862,139,456
  5. Step 5: Solve for x
    x = 21,952,243,862,139,456/168,911,797.20
  6. Step 6: Final answer
    x = 129,962,762.97

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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.