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Finding the Fourth Proportional to 89,900.40, 134,850.60 and 72,987.60

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Solution

The fourth proportional to 89,900.40, 134,850.60 and 72,987.60 is: 109,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,900.40 : 134,850.60 = 72,987.60 : x
  2. Step 2: Convert to fraction form
    89,900.40/134,850.60 = 72,987.60/x
  3. Step 3: Cross multiply
    89,900.40x = 134,850.60 × 72,987.60
  4. Step 4: Simplify right side
    89,900.40x = 9,842,421,652.56
  5. Step 5: Solve for x
    x = 9,842,421,652.56/89,900.40
  6. Step 6: Final answer
    x = 109,481.40

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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.