Home / 107,355.20-161,032.80-67,438.40

Finding the Fourth Proportional to 107,355.20, 161,032.80 and 67,438.40

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Solution

The fourth proportional to 107,355.20, 161,032.80 and 67,438.40 is: 101,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,355.20 : 161,032.80 = 67,438.40 : x
  2. Step 2: Convert to fraction form
    107,355.20/161,032.80 = 67,438.40/x
  3. Step 3: Cross multiply
    107,355.20x = 161,032.80 × 67,438.40
  4. Step 4: Simplify right side
    107,355.20x = 10,859,794,379.52
  5. Step 5: Solve for x
    x = 10,859,794,379.52/107,355.20
  6. Step 6: Final answer
    x = 101,157.60

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1.5x scale

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.