Home / 139,835.11-192,971.47-76,172.91

Finding the Fourth Proportional to 139,835.11, 192,971.47 and 76,172.91

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Solution

The fourth proportional to 139,835.11, 192,971.47 and 76,172.91 is: 105,118.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,835.11 : 192,971.47 = 76,172.91 : x
  2. Step 2: Convert to fraction form
    139,835.11/192,971.47 = 76,172.91/x
  3. Step 3: Cross multiply
    139,835.11x = 192,971.47 × 76,172.91
  4. Step 4: Simplify right side
    139,835.11x = 14,699,198,226.45
  5. Step 5: Solve for x
    x = 14,699,198,226.45/139,835.11
  6. Step 6: Final answer
    x = 105,118.08

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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.