Home / 66,257.20-99,390.60-39,905.20

Finding the Fourth Proportional to 66,257.20, 99,390.60 and 39,905.20

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Solution

The fourth proportional to 66,257.20, 99,390.60 and 39,905.20 is: 59,860.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,257.20 : 99,390.60 = 39,905.20 : x
  2. Step 2: Convert to fraction form
    66,257.20/99,390.60 = 39,905.20/x
  3. Step 3: Cross multiply
    66,257.20x = 99,390.60 × 39,905.20
  4. Step 4: Simplify right side
    66,257.20x = 3,966,201,771.12
  5. Step 5: Solve for x
    x = 3,966,201,771.12/66,257.20
  6. Step 6: Final answer
    x = 59,860.69

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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.