Home / 99,731.40-149,337.90-78,822.60

Finding the Fourth Proportional to 99,731.40, 149,337.90 and 78,822.60

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Solution

The fourth proportional to 99,731.40, 149,337.90 and 78,822.60 is: 118,029.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,731.40 : 149,337.90 = 78,822.60 : x
  2. Step 2: Convert to fraction form
    99,731.40/149,337.90 = 78,822.60/x
  3. Step 3: Cross multiply
    99,731.40x = 149,337.90 × 78,822.60
  4. Step 4: Simplify right side
    99,731.40x = 11,771,201,556.54
  5. Step 5: Solve for x
    x = 11,771,201,556.54/99,731.40
  6. Step 6: Final answer
    x = 118,029.04

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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.