Home / 99,765.20-149,820.60-53,109.20

Finding the Fourth Proportional to 99,765.20, 149,820.60 and 53,109.20

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Solution

The fourth proportional to 99,765.20, 149,820.60 and 53,109.20 is: 79,755.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,765.20 : 149,820.60 = 53,109.20 : x
  2. Step 2: Convert to fraction form
    99,765.20/149,820.60 = 53,109.20/x
  3. Step 3: Cross multiply
    99,765.20x = 149,820.60 × 53,109.20
  4. Step 4: Simplify right side
    99,765.20x = 7,956,852,209.52
  5. Step 5: Solve for x
    x = 7,956,852,209.52/99,765.20
  6. Step 6: Final answer
    x = 79,755.79

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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.