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Finding the Fourth Proportional to 102,515.20, 153,859.20 and 49,969.60

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Solution

The fourth proportional to 102,515.20, 153,859.20 and 49,969.60 is: 74,996.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,515.20 : 153,859.20 = 49,969.60 : x
  2. Step 2: Convert to fraction form
    102,515.20/153,859.20 = 49,969.60/x
  3. Step 3: Cross multiply
    102,515.20x = 153,859.20 × 49,969.60
  4. Step 4: Simplify right side
    102,515.20x = 7,688,282,680.32
  5. Step 5: Solve for x
    x = 7,688,282,680.32/102,515.20
  6. Step 6: Final answer
    x = 74,996.51

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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.