Home / 258,649,116.10-388,145,027.70-142,145,831.21

Finding the Fourth Proportional to 258,649,116.10, 388,145,027.70 and 142,145,831.21

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Solution

The fourth proportional to 258,649,116.10, 388,145,027.70 and 142,145,831.21 is: 213,312,917.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,649,116.10 : 388,145,027.70 = 142,145,831.21 : x
  2. Step 2: Convert to fraction form
    258,649,116.10/388,145,027.70 = 142,145,831.21/x
  3. Step 3: Cross multiply
    258,649,116.10x = 388,145,027.70 × 142,145,831.21
  4. Step 4: Simplify right side
    258,649,116.10x = 55,173,197,590,504,256
  5. Step 5: Solve for x
    x = 55,173,197,590,504,256/258,649,116.10
  6. Step 6: Final answer
    x = 213,312,917.60

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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.