Home / 128,747,950.88-177,666,763.44-72,997,121.60

Finding the Fourth Proportional to 128,747,950.88, 177,666,763.44 and 72,997,121.60

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Solution

The fourth proportional to 128,747,950.88, 177,666,763.44 and 72,997,121.60 is: 100,732,961.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,747,950.88 : 177,666,763.44 = 72,997,121.60 : x
  2. Step 2: Convert to fraction form
    128,747,950.88/177,666,763.44 = 72,997,121.60/x
  3. Step 3: Cross multiply
    128,747,950.88x = 177,666,763.44 × 72,997,121.60
  4. Step 4: Simplify right side
    128,747,950.88x = 12,969,162,335,108,114
  5. Step 5: Solve for x
    x = 12,969,162,335,108,114/128,747,950.88
  6. Step 6: Final answer
    x = 100,732,961.16

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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.