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Finding the Fourth Proportional to 102,990.96, 154,515.60 and 60,908.40

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Solution

The fourth proportional to 102,990.96, 154,515.60 and 60,908.40 is: 91,379.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,990.96 : 154,515.60 = 60,908.40 : x
  2. Step 2: Convert to fraction form
    102,990.96/154,515.60 = 60,908.40/x
  3. Step 3: Cross multiply
    102,990.96x = 154,515.60 × 60,908.40
  4. Step 4: Simplify right side
    102,990.96x = 9,411,297,971.04
  5. Step 5: Solve for x
    x = 9,411,297,971.04/102,990.96
  6. Step 6: Final answer
    x = 91,379.85

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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.