Home / 128,747,948.88-177,666,760.68-72,997,119.60

Finding the Fourth Proportional to 128,747,948.88, 177,666,760.68 and 72,997,119.60

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Solution

The fourth proportional to 128,747,948.88, 177,666,760.68 and 72,997,119.60 is: 100,732,958.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,747,948.88 : 177,666,760.68 = 72,997,119.60 : x
  2. Step 2: Convert to fraction form
    128,747,948.88/177,666,760.68 = 72,997,119.60/x
  3. Step 3: Cross multiply
    128,747,948.88x = 177,666,760.68 × 72,997,119.60
  4. Step 4: Simplify right side
    128,747,948.88x = 12,969,161,778,302,536
  5. Step 5: Solve for x
    x = 12,969,161,778,302,536/128,747,948.88
  6. Step 6: Final answer
    x = 100,732,958.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.