Home / 128,930,401.35-192,970,449.23-90,666,649.35

Finding the Fourth Proportional to 128,930,401.35, 192,970,449.23 and 90,666,649.35

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Solution

The fourth proportional to 128,930,401.35, 192,970,449.23 and 90,666,649.35 is: 135,700,997.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,930,401.35 : 192,970,449.23 = 90,666,649.35 : x
  2. Step 2: Convert to fraction form
    128,930,401.35/192,970,449.23 = 90,666,649.35/x
  3. Step 3: Cross multiply
    128,930,401.35x = 192,970,449.23 × 90,666,649.35
  4. Step 4: Simplify right side
    128,930,401.35x = 17,495,984,054,795,052
  5. Step 5: Solve for x
    x = 17,495,984,054,795,052/128,930,401.35
  6. Step 6: Final answer
    x = 135,700,997.37

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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.