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Finding the Fourth Proportional to 102,937.20, 154,420.20 and 43,772.40

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Solution

The fourth proportional to 102,937.20, 154,420.20 and 43,772.40 is: 65,664.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,937.20 : 154,420.20 = 43,772.40 : x
  2. Step 2: Convert to fraction form
    102,937.20/154,420.20 = 43,772.40/x
  3. Step 3: Cross multiply
    102,937.20x = 154,420.20 × 43,772.40
  4. Step 4: Simplify right side
    102,937.20x = 6,759,342,762.48
  5. Step 5: Solve for x
    x = 6,759,342,762.48/102,937.20
  6. Step 6: Final answer
    x = 65,664.72

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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.