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Finding the Fourth Proportional to 102,724, 154,120.60 and 64,729.15

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Solution

The fourth proportional to 102,724, 154,120.60 and 64,729.15 is: 97,115.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,724 : 154,120.60 = 64,729.15 : x
  2. Step 2: Convert to fraction form
    102,724/154,120.60 = 64,729.15/x
  3. Step 3: Cross multiply
    102,724x = 154,120.60 × 64,729.15
  4. Step 4: Simplify right side
    102,724x = 9,976,095,435.49
  5. Step 5: Solve for x
    x = 9,976,095,435.49/102,724
  6. Step 6: Final answer
    x = 97,115.53

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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.