Home / 90,347,999.40-135,521,999.10-76,743,109.80

Finding the Fourth Proportional to 90,347,999.40, 135,521,999.10 and 76,743,109.80

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Solution

The fourth proportional to 90,347,999.40, 135,521,999.10 and 76,743,109.80 is: 115,114,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,347,999.40 : 135,521,999.10 = 76,743,109.80 : x
  2. Step 2: Convert to fraction form
    90,347,999.40/135,521,999.10 = 76,743,109.80/x
  3. Step 3: Cross multiply
    90,347,999.40x = 135,521,999.10 × 76,743,109.80
  4. Step 4: Simplify right side
    90,347,999.40x = 10,400,379,657,246,800
  5. Step 5: Solve for x
    x = 10,400,379,657,246,800/90,347,999.40
  6. Step 6: Final answer
    x = 115,114,664.70

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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.