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Finding the Fourth Proportional to 90,717.55, 135,912.30 and 77,595.55

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Solution

The fourth proportional to 90,717.55, 135,912.30 and 77,595.55 is: 116,253.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,717.55 : 135,912.30 = 77,595.55 : x
  2. Step 2: Convert to fraction form
    90,717.55/135,912.30 = 77,595.55/x
  3. Step 3: Cross multiply
    90,717.55x = 135,912.30 × 77,595.55
  4. Step 4: Simplify right side
    90,717.55x = 10,546,189,670.27
  5. Step 5: Solve for x
    x = 10,546,189,670.27/90,717.55
  6. Step 6: Final answer
    x = 116,253.03

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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.