Home / 139,905.78-193,064.36-76,242.21

Finding the Fourth Proportional to 139,905.78, 193,064.36 and 76,242.21

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Solution

The fourth proportional to 139,905.78, 193,064.36 and 76,242.21 is: 105,211.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,905.78 : 193,064.36 = 76,242.21 : x
  2. Step 2: Convert to fraction form
    139,905.78/193,064.36 = 76,242.21/x
  3. Step 3: Cross multiply
    139,905.78x = 193,064.36 × 76,242.21
  4. Step 4: Simplify right side
    139,905.78x = 14,719,653,097.42
  5. Step 5: Solve for x
    x = 14,719,653,097.42/139,905.78
  6. Step 6: Final answer
    x = 105,211.19

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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.