Home / 123,090.40-184,635.60-78,767.20

Finding the Fourth Proportional to 123,090.40, 184,635.60 and 78,767.20

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Solution

The fourth proportional to 123,090.40, 184,635.60 and 78,767.20 is: 118,150.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,090.40 : 184,635.60 = 78,767.20 : x
  2. Step 2: Convert to fraction form
    123,090.40/184,635.60 = 78,767.20/x
  3. Step 3: Cross multiply
    123,090.40x = 184,635.60 × 78,767.20
  4. Step 4: Simplify right side
    123,090.40x = 14,543,229,232.32
  5. Step 5: Solve for x
    x = 14,543,229,232.32/123,090.40
  6. Step 6: Final answer
    x = 118,150.80

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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.