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Finding the Fourth Proportional to 103,178.72, 154,825.36 and 55,792.64

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Solution

The fourth proportional to 103,178.72, 154,825.36 and 55,792.64 is: 83,719.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,178.72 : 154,825.36 = 55,792.64 : x
  2. Step 2: Convert to fraction form
    103,178.72/154,825.36 = 55,792.64/x
  3. Step 3: Cross multiply
    103,178.72x = 154,825.36 × 55,792.64
  4. Step 4: Simplify right side
    103,178.72x = 8,638,115,573.35
  5. Step 5: Solve for x
    x = 8,638,115,573.35/103,178.72
  6. Step 6: Final answer
    x = 83,719.93

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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.