Home / 139,900.78-193,057.45-76,237.21

Finding the Fourth Proportional to 139,900.78, 193,057.45 and 76,237.21

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Solution

The fourth proportional to 139,900.78, 193,057.45 and 76,237.21 is: 105,204.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,900.78 : 193,057.45 = 76,237.21 : x
  2. Step 2: Convert to fraction form
    139,900.78/193,057.45 = 76,237.21/x
  3. Step 3: Cross multiply
    139,900.78x = 193,057.45 × 76,237.21
  4. Step 4: Simplify right side
    139,900.78x = 14,718,161,357.71
  5. Step 5: Solve for x
    x = 14,718,161,357.71/139,900.78
  6. Step 6: Final answer
    x = 105,204.28

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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.