Home / 140,438.80-211,032.60-77,309.20

Finding the Fourth Proportional to 140,438.80, 211,032.60 and 77,309.20

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Solution

The fourth proportional to 140,438.80, 211,032.60 and 77,309.20 is: 116,169.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,438.80 : 211,032.60 = 77,309.20 : x
  2. Step 2: Convert to fraction form
    140,438.80/211,032.60 = 77,309.20/x
  3. Step 3: Cross multiply
    140,438.80x = 211,032.60 × 77,309.20
  4. Step 4: Simplify right side
    140,438.80x = 16,314,761,479.92
  5. Step 5: Solve for x
    x = 16,314,761,479.92/140,438.80
  6. Step 6: Final answer
    x = 116,169.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.