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Finding the Fourth Proportional to 139,913.76, 193,076.10 and 76,250.28

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Solution

The fourth proportional to 139,913.76, 193,076.10 and 76,250.28 is: 105,222.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,913.76 : 193,076.10 = 76,250.28 : x
  2. Step 2: Convert to fraction form
    139,913.76/193,076.10 = 76,250.28/x
  3. Step 3: Cross multiply
    139,913.76x = 193,076.10 × 76,250.28
  4. Step 4: Simplify right side
    139,913.76x = 14,722,106,686.31
  5. Step 5: Solve for x
    x = 14,722,106,686.31/139,913.76
  6. Step 6: Final answer
    x = 105,222.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.