Home / 139,979.80-193,172.22-76,317.72

Finding the Fourth Proportional to 139,979.80, 193,172.22 and 76,317.72

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Solution

The fourth proportional to 139,979.80, 193,172.22 and 76,317.72 is: 105,318.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,979.80 : 193,172.22 = 76,317.72 : x
  2. Step 2: Convert to fraction form
    139,979.80/193,172.22 = 76,317.72/x
  3. Step 3: Cross multiply
    139,979.80x = 193,172.22 × 76,317.72
  4. Step 4: Simplify right side
    139,979.80x = 14,742,463,397.74
  5. Step 5: Solve for x
    x = 14,742,463,397.74/139,979.80
  6. Step 6: Final answer
    x = 105,318.51

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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.