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Finding the Fourth Proportional to 139,873.48, 193,027.56 and 76,211.28

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Solution

The fourth proportional to 139,873.48, 193,027.56 and 76,211.28 is: 105,172.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,873.48 : 193,027.56 = 76,211.28 : x
  2. Step 2: Convert to fraction form
    139,873.48/193,027.56 = 76,211.28/x
  3. Step 3: Cross multiply
    139,873.48x = 193,027.56 × 76,211.28
  4. Step 4: Simplify right side
    139,873.48x = 14,710,877,422.88
  5. Step 5: Solve for x
    x = 14,710,877,422.88/139,873.48
  6. Step 6: Final answer
    x = 105,172.74

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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.