Home / 90,985,423.20-136,478,134.80-81,915,496.80

Finding the Fourth Proportional to 90,985,423.20, 136,478,134.80 and 81,915,496.80

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Solution

The fourth proportional to 90,985,423.20, 136,478,134.80 and 81,915,496.80 is: 122,873,245.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,985,423.20 : 136,478,134.80 = 81,915,496.80 : x
  2. Step 2: Convert to fraction form
    90,985,423.20/136,478,134.80 = 81,915,496.80/x
  3. Step 3: Cross multiply
    90,985,423.20x = 136,478,134.80 × 81,915,496.80
  4. Step 4: Simplify right side
    90,985,423.20x = 11,179,674,214,479,370
  5. Step 5: Solve for x
    x = 11,179,674,214,479,370/90,985,423.20
  6. Step 6: Final answer
    x = 122,873,245.20

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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.