Home / 79,938.78-119,922.57-39,978.60

Finding the Fourth Proportional to 79,938.78, 119,922.57 and 39,978.60

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Solution

The fourth proportional to 79,938.78, 119,922.57 and 39,978.60 is: 59,975.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,938.78 : 119,922.57 = 39,978.60 : x
  2. Step 2: Convert to fraction form
    79,938.78/119,922.57 = 39,978.60/x
  3. Step 3: Cross multiply
    79,938.78x = 119,922.57 × 39,978.60
  4. Step 4: Simplify right side
    79,938.78x = 4,794,336,457.00
  5. Step 5: Solve for x
    x = 4,794,336,457.00/79,938.78
  6. Step 6: Final answer
    x = 59,975.10

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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.