Home / 139,899.78-193,056.08-76,236.21

Finding the Fourth Proportional to 139,899.78, 193,056.08 and 76,236.21

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Solution

The fourth proportional to 139,899.78, 193,056.08 and 76,236.21 is: 105,202.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,899.78 : 193,056.08 = 76,236.21 : x
  2. Step 2: Convert to fraction form
    139,899.78/193,056.08 = 76,236.21/x
  3. Step 3: Cross multiply
    139,899.78x = 193,056.08 × 76,236.21
  4. Step 4: Simplify right side
    139,899.78x = 14,717,863,475.48
  5. Step 5: Solve for x
    x = 14,717,863,475.48/139,899.78
  6. Step 6: Final answer
    x = 105,202.91

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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.