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Finding the Fourth Proportional to 100,908.10, 151,362.15 and 91,066.60

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Solution

The fourth proportional to 100,908.10, 151,362.15 and 91,066.60 is: 136,599.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,908.10 : 151,362.15 = 91,066.60 : x
  2. Step 2: Convert to fraction form
    100,908.10/151,362.15 = 91,066.60/x
  3. Step 3: Cross multiply
    100,908.10x = 151,362.15 × 91,066.60
  4. Step 4: Simplify right side
    100,908.10x = 13,784,036,369.19
  5. Step 5: Solve for x
    x = 13,784,036,369.19/100,908.10
  6. Step 6: Final answer
    x = 136,599.90

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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.