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Finding the Fourth Proportional to 123,308.40, 184,962.60 and 85,983.60

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Solution

The fourth proportional to 123,308.40, 184,962.60 and 85,983.60 is: 128,975.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,308.40 : 184,962.60 = 85,983.60 : x
  2. Step 2: Convert to fraction form
    123,308.40/184,962.60 = 85,983.60/x
  3. Step 3: Cross multiply
    123,308.40x = 184,962.60 × 85,983.60
  4. Step 4: Simplify right side
    123,308.40x = 15,903,750,213.36
  5. Step 5: Solve for x
    x = 15,903,750,213.36/123,308.40
  6. Step 6: Final answer
    x = 128,975.40

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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.