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Finding the Fourth Proportional to 159,978.24, 220,759.20 and 88,358.40

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Solution

The fourth proportional to 159,978.24, 220,759.20 and 88,358.40 is: 121,928.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,978.24 : 220,759.20 = 88,358.40 : x
  2. Step 2: Convert to fraction form
    159,978.24/220,759.20 = 88,358.40/x
  3. Step 3: Cross multiply
    159,978.24x = 220,759.20 × 88,358.40
  4. Step 4: Simplify right side
    159,978.24x = 19,505,929,697.28
  5. Step 5: Solve for x
    x = 19,505,929,697.28/159,978.24
  6. Step 6: Final answer
    x = 121,928.64

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1.5x scale

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.