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Finding the Fourth Proportional to 89,812.80, 134,719.20 and 74,066.40

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Solution

The fourth proportional to 89,812.80, 134,719.20 and 74,066.40 is: 111,099.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,812.80 : 134,719.20 = 74,066.40 : x
  2. Step 2: Convert to fraction form
    89,812.80/134,719.20 = 74,066.40/x
  3. Step 3: Cross multiply
    89,812.80x = 134,719.20 × 74,066.40
  4. Step 4: Simplify right side
    89,812.80x = 9,978,166,154.88
  5. Step 5: Solve for x
    x = 9,978,166,154.88/89,812.80
  6. Step 6: Final answer
    x = 111,099.60

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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.