Home / 115,920,010.40-173,880,015.60-81,907,786.40

Finding the Fourth Proportional to 115,920,010.40, 173,880,015.60 and 81,907,786.40

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Solution

The fourth proportional to 115,920,010.40, 173,880,015.60 and 81,907,786.40 is: 122,861,679.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,920,010.40 : 173,880,015.60 = 81,907,786.40 : x
  2. Step 2: Convert to fraction form
    115,920,010.40/173,880,015.60 = 81,907,786.40/x
  3. Step 3: Cross multiply
    115,920,010.40x = 173,880,015.60 × 81,907,786.40
  4. Step 4: Simplify right side
    115,920,010.40x = 14,242,127,176,993,468
  5. Step 5: Solve for x
    x = 14,242,127,176,993,468/115,920,010.40
  6. Step 6: Final answer
    x = 122,861,679.60

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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.