Home / 125,638.64-173,421.76-80,438.37

Finding the Fourth Proportional to 125,638.64, 173,421.76 and 80,438.37

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Solution

The fourth proportional to 125,638.64, 173,421.76 and 80,438.37 is: 111,030.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,638.64 : 173,421.76 = 80,438.37 : x
  2. Step 2: Convert to fraction form
    125,638.64/173,421.76 = 80,438.37/x
  3. Step 3: Cross multiply
    125,638.64x = 173,421.76 × 80,438.37
  4. Step 4: Simplify right side
    125,638.64x = 13,949,762,996.33
  5. Step 5: Solve for x
    x = 13,949,762,996.33/125,638.64
  6. Step 6: Final answer
    x = 111,030.83

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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.