Home / 421,015,735.71-631,566,917.70-158,921,053.29

Finding the Fourth Proportional to 421,015,735.71, 631,566,917.70 and 158,921,053.29

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Solution

The fourth proportional to 421,015,735.71, 631,566,917.70 and 158,921,053.29 is: 238,397,929.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,015,735.71 : 631,566,917.70 = 158,921,053.29 : x
  2. Step 2: Convert to fraction form
    421,015,735.71/631,566,917.70 = 158,921,053.29/x
  3. Step 3: Cross multiply
    421,015,735.71x = 631,566,917.70 × 158,921,053.29
  4. Step 4: Simplify right side
    421,015,735.71x = 100,369,279,784,002,752
  5. Step 5: Solve for x
    x = 100,369,279,784,002,752/421,015,735.71
  6. Step 6: Final answer
    x = 238,397,929.75

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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.