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Finding the Fourth Proportional to 88,956.20, 133,507.20 and 86,040.20

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Solution

The fourth proportional to 88,956.20, 133,507.20 and 86,040.20 is: 129,130.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,956.20 : 133,507.20 = 86,040.20 : x
  2. Step 2: Convert to fraction form
    88,956.20/133,507.20 = 86,040.20/x
  3. Step 3: Cross multiply
    88,956.20x = 133,507.20 × 86,040.20
  4. Step 4: Simplify right side
    88,956.20x = 11,486,986,189.44
  5. Step 5: Solve for x
    x = 11,486,986,189.44/88,956.20
  6. Step 6: Final answer
    x = 129,130.81

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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.