Home / 74,686.60-111,705.90-66,845.80

Finding the Fourth Proportional to 74,686.60, 111,705.90 and 66,845.80

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Solution

The fourth proportional to 74,686.60, 111,705.90 and 66,845.80 is: 99,978.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,686.60 : 111,705.90 = 66,845.80 : x
  2. Step 2: Convert to fraction form
    74,686.60/111,705.90 = 66,845.80/x
  3. Step 3: Cross multiply
    74,686.60x = 111,705.90 × 66,845.80
  4. Step 4: Simplify right side
    74,686.60x = 7,467,070,250.22
  5. Step 5: Solve for x
    x = 7,467,070,250.22/74,686.60
  6. Step 6: Final answer
    x = 99,978.71

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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.