Home / 90,372.40-135,558.60-85,998.40

Finding the Fourth Proportional to 90,372.40, 135,558.60 and 85,998.40

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Solution

The fourth proportional to 90,372.40, 135,558.60 and 85,998.40 is: 128,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,372.40 : 135,558.60 = 85,998.40 : x
  2. Step 2: Convert to fraction form
    90,372.40/135,558.60 = 85,998.40/x
  3. Step 3: Cross multiply
    90,372.40x = 135,558.60 × 85,998.40
  4. Step 4: Simplify right side
    90,372.40x = 11,657,822,706.24
  5. Step 5: Solve for x
    x = 11,657,822,706.24/90,372.40
  6. Step 6: Final answer
    x = 128,997.60

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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.