Home / 99,729.40-149,334.90-78,820.60

Finding the Fourth Proportional to 99,729.40, 149,334.90 and 78,820.60

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Solution

The fourth proportional to 99,729.40, 149,334.90 and 78,820.60 is: 118,026.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,729.40 : 149,334.90 = 78,820.60 : x
  2. Step 2: Convert to fraction form
    99,729.40/149,334.90 = 78,820.60/x
  3. Step 3: Cross multiply
    99,729.40x = 149,334.90 × 78,820.60
  4. Step 4: Simplify right side
    99,729.40x = 11,770,666,418.94
  5. Step 5: Solve for x
    x = 11,770,666,418.94/99,729.40
  6. Step 6: Final answer
    x = 118,026.04

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1.5x scale

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.