Home / 137,421.04-189,678.36-80,850.64

Finding the Fourth Proportional to 137,421.04, 189,678.36 and 80,850.64

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Solution

The fourth proportional to 137,421.04, 189,678.36 and 80,850.64 is: 111,595.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,421.04 : 189,678.36 = 80,850.64 : x
  2. Step 2: Convert to fraction form
    137,421.04/189,678.36 = 80,850.64/x
  3. Step 3: Cross multiply
    137,421.04x = 189,678.36 × 80,850.64
  4. Step 4: Simplify right side
    137,421.04x = 15,335,616,800.15
  5. Step 5: Solve for x
    x = 15,335,616,800.15/137,421.04
  6. Step 6: Final answer
    x = 111,595.84

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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.